Formation of the child for weeks in the womb. Fashion tips - women's online magazine

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In 9 months, a child goes a long way from a tiny embryo to a chubby baby and already in the womb acquires some features that will remain with him for life: for example, you can understand whether he will become right-handed or left-handed and what food he will prefer. In a fairly short period of time, a lot of interesting things happen to the child, and today we offer you to walk with the baby the path from birth to birth.

site prepared this exciting journey for you.

1st trimester of pregnancy

1-2 weeks

So the long journey has begun. For the first 4 days, the future person is smaller than a grain of salt - its size is only 0.14 mm. However, starting from the 5th day, it begins to grow and by the 6th it almost doubles - up to as much as 0.2 mm. On the 4th day, the embryo "arrives" where it will spend the next 9 months - in the uterus, and on the 8th day it is implanted into its wall.

3-4th week

The embryo at the 4th week of pregnancy.

Around the 20th day of pregnancy, a very important event occurs: a neural tube appears, which then turns into the baby's spinal cord and brain. Already on the 21st day, his heart begins to beat and all important organs are formed, for example, the kidneys and liver. The eyes have not yet taken their usual position - the bubbles, from which they will then take shape, are on the sides of the head. By the end of the 1st month, a circulatory system appears in the embryo, and the spine and muscles begin to develop.

5-6th week

At the 5th week, the hands of the embryo appear, however, the fingers are still very difficult to distinguish, but in the joints the arms and legs are already bent. It was at this time that the external genital organs begin to form, but it is not yet possible to see on an ultrasound whether it is a boy or a girl. By the way, since its inception, the embryo has grown a lot - it has increased as much as 10 thousand times. Even now, the baby's face is beginning to form, and the eyes, which will be closed for a very long time, darken, becoming more human-like.

7-8th week

The 7th week of pregnancy is the time when the baby begins to move, however, it is still completely invisible to the mother, and the fingers and toes become almost the same as in adults. At this stage, the embryo begins to develop the rudiments of milk teeth and the reproductive system develops, and the kidneys begin to produce urine. Despite the fact that the growth of the fetus is only 2.5 cm, it acquires its own facial expressions, its eyelids appear, and the tip of the nose becomes more defined.

9-10th week

The child is 9-10 weeks pregnant.

By this time, the baby has already grown well - its weight is 4 grams, and its height is 2-3 cm. Despite its tiny size, the brain is already divided into two hemispheres, and milk teeth and taste buds are beginning to form. The baby's tail and membranes between the fingers disappear, he begins to swim in the amniotic fluid and move even more actively, although it is still imperceptible for the mother. It is at this time that the child's individual facial features appear, and hair begins to grow on the head.

11-12th week

At this time, the child's genitals are formed, therefore, on an ultrasound scan, you can already find out his gender, although the likelihood of an error is still high. The child still looks slightly alien: he has a large head and a small body, but his face looks more and more like an adult. The ears are already almost in the desired position, eyebrows and eyelashes appear. The cartilage that makes up the skeleton gradually ossifies, new blood vessels appear and hormone production begins. By the way, the baby has already grown up to 6 cm and weighs about 20 grams.

13-14th week

The baby is in the 14th week of pregnancy.

Despite the fact that the child's head is half the length of the entire body, the face is increasingly reminiscent of an adult, and the rudiments of all 20 milk teeth have already been formed in the oral cavity. The child is already able to put a finger in his mouth, but he will learn to suck a little later. Due to the active formation of blood vessels, the baby's skin is red and very thin, therefore, vellus hair appears on the body - lanugo, which is necessary to maintain a special lubricant that protects against hypothermia.

2nd trimester of pregnancy

15-16th week

By the 15th week, the baby grows to 10 cm and gains weight - now he weighs about 70 grams. Despite the fact that the eyes are still quite low, the face is already quite recognizable, moreover, the child begins to "make faces", since the facial muscles are well developed. By this time, he already knows how to suck a finger, and the sebaceous and sweat glands begin their work.

17-18th week

And finally, the child's auditory canals are formed, so he begins to distinguish sounds well and hears the mother's voice, moreover, he is able to recognize it. In addition to milk teeth, molar embryos also appear, the bones are finally formed and begin to harden. By the way, the bones of the skull will remain mobile until birth - when passing through the birth canal, they will be superimposed on each other to make it easier for the baby to be born. But the mother is finally beginning to feel the movements of the child, who has grown to 14 cm and 190 grams.

19-20th week

The baby is in the 20th week of pregnancy.

Despite the fact that the child's eyes are still closed, he is already well oriented in the surrounding space. Moreover, now it is possible to understand whether the child will be right-handed or left-handed, because right now he begins to more actively use his leading hand. Fingerprints appear on the baby's fingers - another unique sign of each of us. By the way, the child is already beginning to gradually distinguish day from night and is active at a certain time.

21-22 weeks

21st week - the time when the baby begins to gain weight due to the formation of subcutaneous fat. Soon, folds, which newborns have, will appear on its arms and legs. At the 22nd week, those neurons that will be with a person all his life are formed in the brain. Very soon the child will open his eyes, he is already trying to do this, and the eyeballs move almost like an adult.

23-24th week

At the 23rd week, the child may begin to dream, and his face is so formed that an ultrasound scan can determine whose facial features he inherited. His skin becomes opaque, his eyes open, and the child can already react to light, moreover, bright flashes can scare him. By the 24th week, the child grows to almost 30 cm, and his weight reaches 0.5 kg.

25-26th week

At this time, the baby's taste buds are finally formed and, tasting the amniotic fluid, he may frown if he does not like it. By the way, eating habits are formed in this way - already in the womb we have our favorite and unloved foods. Very soon the child will learn to blink and can already see a little, however, so far it is very, very vague.

3rd trimester of pregnancy

27-28th week

Child at 27–28 weeks of gestation.

If you do an ultrasound scan at this time, you can see how the child smiles and intensively sucks his finger. At this time, the baby gets the first "toy" - his own umbilical cord, and he is actively studying his body. At the end of the 7th month of pregnancy, the child develops an individual metabolism, which he will have throughout his life. The kid is already quite large - his weight reaches 1.2 kg, and his height is 35 cm.

29-30th week

The baby is in the 30th week of pregnancy.

The layer of subcutaneous fat increases and the baby becomes more plump and well-fed. In addition, he already knows how to cry, cough and even sometimes hiccup - this happens, most likely, when he swallows too much amniotic fluid. By the 30th week, the child's brain is already so developed that it is quite capable of memorizing and even analyzing information.

31st-32nd week

At this time, a person has all 5 senses, and his daily routine more and more resembles the one that he will follow after birth. The child hears the work of all organs of the mother, knows her voice perfectly, thanks to which, immediately after birth, he is able to distinguish her from all other people. The baby's immune system begins to produce antibodies that will protect him from all kinds of infections that may lie in wait in the first days and months after birth.

37-38th week

And finally, the process of human formation has come to an end completely - now he is completely ready for birth, and obstetricians consider the pregnancy to be full-term. Lanugo finally disappears from his body and only sometimes can remain on the arms and legs. Since there is almost no room left in the uterus, it may seem to the mother that the baby has begun to move more intensely, but in fact the force of the blows has increased, because the baby's muscles have already been finally formed and strengthened.

39-40th week

The first minutes after birth.

The baby's lungs continue to form until the very birth, and only by the time of birth do they release the right amount of surfactant - a substance that prevents the alveoli from sticking together after the first independent breath. Very soon, the baby will announce his birth with the first cry and will begin his long journey across a large and interesting world.

Read in this article:

The birth of a new life is the most beautiful secret of nature. What could be more mysterious than the development of a child in the womb? The formation of a little man from a fertilized egg goes through a rather difficult path. It will be very interesting for expectant mothers to know how the intrauterine development of the child takes place by week.

Initial development of pregnancy

Pregnancy lasts 40 weeks or 10 obstetric months. The term obstetric month refers to 28 calendar days. But the beginning of pregnancy itself is considered the first day of the menstrual cycle. Thus, according to medical calculations, pregnancy lasts not 40, but 38 weeks.

So, fertilization took place: the sperm entered the egg and formed a single cell with two nuclei. These nuclei, moving towards each other, form a zygote. A zygote is a single-celled embryo. This fact is the beginning of the development of a new life.

The zygote lives for 30 hours, after which its first division occurs. In the following days, cell division is repeated. On the fourth day of life, the embryo consists of 8-12 cells. By this time, this small lump reaches the uterine cavity, where the process of cell division increases intensively.

By the seventh day, the embryo already consists of hundreds of cells. On the eighth day, the embryo is attached to the wall of the uterus, where its walls have acquired a loose and thickened structure. The implantation process takes about 40 hours.

On the 14th day of the embryo's life, its posterior part thickens, preparing for the formation of the main organs.

Already in the second week after fertilization, pregnancy can be determined using tests. A small embryo already on the 3rd day of its life begins to produce a hormone - gonadoprin. All pregnancy tests are sensitive to this hormone.

At the end of 4 weeks, the woman discovers the absence of menstruation. The first symptoms of pregnancy will appear: nausea, dizziness, drowsiness.

During this period, the embryo is already called an embryo, the size of which is about 1 mm.

The development of a child in the womb can be divided into three main periods:

• Blastogenesis - the first 15 days.
• Organogenesis is the development of the embryo from 15 days to 10 weeks of pregnancy.
• The fetal period is the development of the fetus in the womb.

If we divide the entire pregnancy into 3 equal periods, then we get the following time intervals: the first, second and third trimesters. Each trimester lasts 3 months.

If a woman is not yet aware of her "interesting position" and continues to lead an inappropriate lifestyle, then the embryo will most likely die at the stage of blastogenesis. If the mother's destructive lifestyle does not change within the first 12 weeks, there is a high probability of miscarriage.

Embryonic development of a child in the womb

The development of the embryo is a key moment in pregnancy, since during this period all vital organs are laid, which will affect the health of the baby in the future.

Mom should never be nervous: only peace and positive emotions!

By the end of 5 weeks, the embryo consists of three cell layers: ectoderm, endoderm, and mesoderm. Ectoderm is the basis of the nervous system, hair and skin. The endoderm will develop into the gastrointestinal tract in the future. The mesoderm will turn into skeletal and muscle tissue, and will also form the basis of the circulatory, excretory and reproductive systems.

At week 5, a certain heart tube is formed. It can be considered that from this moment the "heart" of the embryo begins to beat.

A groove forms on the back of the embryo, which is the basis of the spinal cord and the entire nervous system. It is very important for the expectant mother to take enough folic acid during this period. This substance contributes to the full formation of the nervous system of the unborn child.

At 6 weeks, the embryo takes on a C-shape. During this period, the laying of the primary intestine, cartilage of the skeleton, liver, kidneys, thyroid gland occurs. The small embryo reaches 4 mm.

At the 7th week of pregnancy, women develop toxicosis. This period is characterized by intensive development of the brain. The mouth and eye sockets begin to form. The respiratory system is actively developing, the heart begins to divide into chambers and arteries, the spleen and gallbladder are formed.

At 8 weeks, ultrasound can record the first movements of the embryo.

At week 9, fingers are determined on the upper and lower extremities, although they are still webbed. This period is characterized by the fact that the placenta begins to supply nutrients to the embryo and take away waste products. The fetus already has a sense of taste.

At 10 weeks, the membranes between the fingers disappear, the tail disappears. The sex of the child is still difficult to determine at this age, but the production of testosterone is already beginning in boys.

By 11 weeks, the embryo weighs 5 g with a size of 3 cm. This is the final stage of embryonic development, later the embryo will be called a fetus.

Intrauterine development of the child by weeks in the second trimester of pregnancy

At 12 weeks, the fetus has formed almost all organs and the baby begins to actively move inside the uterus.

This is the beginning of the third stage of fetal development. At this time, as a rule, an ultrasound scan is performed, which determines the quality of the child's development, genetic abnormalities.

If intrauterine abnormalities are found in the fetus, then the woman is recommended to undergo additional studies. But the final conclusions about chromosomal abnormalities can be made at 20 weeks by control ultrasound. If serious pathologies are confirmed, doctors recommend terminating the pregnancy.

It is also worth noting that the older the parents are, the higher the risk of developing pathologies in the child. However, in this case, it may be the other way around: the percentage of the birth of talented children is higher just among older parents.

At 13 weeks, the external genital organs are differentiated. However, they can be distinguished already at 14-15 weeks using ultrasound. At this stage, the formation of the intestine takes place. The baby is fed through the umbilical cord.

From the 14th week, the baby's skeleton begins to form, which was previously represented by cartilage. The length of the arms corresponds to the proportion of the body, and the legs are formed with a certain delay. The baby can yawn and thumb suck. He perceives the vibrations of sounds, distinguishes well the mother's timbre of voice, music.

That is why it is important for expectant mothers to listen to beautiful classical music, thus instilling good taste in the baby.

At 15 weeks, fetal blood vessels become visible, which are enlightened through the thin skin. The skeleton and bone marrow continue to form.

At 16 weeks, a planned ultrasound is performed, on which you can notice the movement of the baby's eye. The legs have become proportional to the length of the body and small marigolds begin to grow.

At 17-18 weeks, the small body is covered with the primary fluff - lanugo. It is a primordial lubricant that protects the skin from the aquatic environment. During this period, fingerprints are laid, which are genetically predetermined.

The weight of the crumbs is 200 g with a height of 14 cm.

At 19-20 weeks, fetal growth begins to slow down somewhat. At this stage, subcutaneous fat is deposited, which keeps the small body warm. The respiratory system is improving more and more, but it is not yet capable of functioning independently.

Mid pregnancy: intensive fetal development

Beginning at the 20th week, the baby's teeth begin to form. In a child, hairs on the head grow more actively, but their pigment is formed a little later.

From 22 weeks old, mothers begin to feel the baby pushing. His weight at this time is 450 g, and his height is 19-20 cm.

From the 23rd week, the baby begins to gain weight. The child begins to see, he even dreams. The active development of the brain takes place.

The muscular system and internal organs continue to actively improve. The respiratory system is developing more and more. The first feces, meconium, accumulate in the baby's intestines.

The baby's skin is red and wrinkled. The child actively reacts to the position of the mother's body and to external sounds. Taste receptors have already formed in the tongue, due to which food addictions are formed in the child. It is important for mothers to understand this and try to avoid spicy and bitter foods, since the little crumb prefers sweets more.

The beginning of the third and final trimester is 27 weeks. By this time, all the organs of the fetus have already formed, and in the future they will be improved, as well as the development of the brain.

At the 29th week, the baby's immune system is formed. The heart rate reaches 120-130 beats per minute. The baby can hiccup, as evidenced by the mother's slight tremors.

A child born at a given date can survive with a certain amount of care. He is 37 cm tall and weighs 1150 g.

Prenatal development of a child in the last stages of pregnancy

For women who are preparing to become mothers of a healthy baby, of course, it will be superfluous to talk about the right lifestyle. Alcohol, cigarettes, lack of regimen, sleep and rest - have a very detrimental effect on the health of the unborn child.

At 30-32 weeks, the baby's fatty subcutaneous layer becomes thicker. Some babies are already turning head down at this stage.

On the surface of the small brain, convolutions appear. The pupils can already detect bright light. When conducting an ultrasound scan at this time, you can see how the baby closes its eyes from bright light. For this reason, it is important to avoid ultraviolet rays and give up beach holidays.

From 33 weeks old, the little man already becomes cramped in his mother's tummy. At this time, the fetus turns its head down, preparing for childbirth.

If premature birth occurs at this stage, then the baby has every chance of surviving. However, he will be considered premature and will require special hospital care.

The skin of the baby becomes pink and not so wrinkled, thanks to the subcutaneous fat. It makes up 8% of the total body weight.

Thanks to the appearance of marigolds, the baby can scratch himself. Some newborns are scratched.

From the 37th week, there has been an active improvement of the respiratory system. Babies born during this period can already cry. Fluffy hair on the body thinns, and on the head it grows intensively. A child gains 30 grams of fat every day.

By this time, the belly sinks, and it becomes easier for mom to breathe. This usually occurs two weeks before delivery.

By this time, the baby is ready to see the light. He is very cramped inside his mother: his knees are pressed tightly to his chin.

At 39 weeks, the body becomes clean: the fluff remains only on the shoulders. The intestinal system of the baby is filled with meconium and amniotic fluid.

At 40 weeks prenatal development ends, and a new person is born! The photo of newborns becomes almost the most important photo in the house. After all, what could be exciting and more beautiful than the birth of a small miracle!

The tummy of a pregnant woman is growing by leaps and bounds, and at the same time, significant changes in the fetus occur. It not only grows in size, but also takes big steps in its development until the very day of childbirth. How does the baby develop in the womb by week?

2 week

The child begins to develop not when the mother's belly begins to grow, but as soon as the fertilized egg is attached to the wall of the uterus and the embryo begins to form. However, in medicine, the first two weeks are not yet called pregnancy, because the question of follicle maturation arises. If this happens, ovulation occurs, fertilization is considered to have taken place. So, the moment of appearance of the fetus in the obstetric sense is equal to two weeks of the "life" of the embryo.

At the 2nd week, the woman does not notice any symptoms, the test does not show pregnancy, the only sign by which one can notice an "interesting position" is the absence of menstruation. In some cases, they are replaced by a scanty pink discharge.

3 week

So, ovulation was successful, the egg merged with the sperm in the fallopian tubes and, by and large, the appearance of the unborn child has already been determined. Part of the chromosomes goes to the zygote from the mother, and part from the father, respectively, according to an equal number of signs, the child takes over from each parent. A fertilized egg begins to divide, moving at the same time into the uterus, and by the time the embryo is attached to its wall, it will number about a hundred cells.

This process most often begins on the 14th day of pregnancy and lasts 5 days. Mom has an increase in the amount of discharge, but if they have a too rich brown color or an unpleasant odor, this is a reason to visit a doctor.

4 week

The embryo is about 1.5 mm in size.

An already pregnant woman does not have menstruation, she can make an assumption about the onset of pregnancy. Characteristic symptoms appear: weakness, drowsiness, tenderness and breast swelling, emotional instability. The hCG hormone begins to be synthesized, the test shows a positive result. The woman's appetite greatly increases and there is an acute reaction to odors.

5 week

The embryo grows up to 2 mm.

It is determined from which side of the embryo the head is formed, and from which - the lower limbs. An axis appears, relative to which paired organs and body parts will be formed. At the 5th week, signs of toxicosis appear.

6 week

The embryo is 3 mm in size at the beginning of the week and reaches 6-7 mm by the end.

The rudiments of the limbs appear, and the cerebral hemispheres are also formed. In the heart, departments are allocated, it begins to pulsate.

The placenta begins to form and its connection with the fetus is formed thanks to the vessels. Symptoms of toxicosis in a woman intensify.

7 week

The embryo grows up to 8-11 mm.

The outlines of parts of the face appear, the brain grows at a high speed. Interdigital spaces begin to form on the hands. The umbilical cord is formed, a strong relationship is created between the fetus and the mother: respiration and nutrition are carried out through the mother's blood.

An ultrasound scan shows an enlargement of the uterus. Mom notices an increased urge to urinate.

8 week

Fruit size - 15-40 mm, weight - 5 g.

Facial features become even more distinct, eyelids form. Ossification of the skull and limbs begins. The structures of the gastrointestinal tract, heart, kidneys and bladder are determined. The fetus makes the first movements that cannot be seen by the mother.

9 week

The embryo reaches the size of a grape - 35-45 mm, weight - 10 g.

The reproductive system begins to form, and the adrenal glands are already synthesizing a number of hormones. The brain continues to develop, the cerebellum is formed. The digestive system is actively developing, the liver is included in the work. Fingers stand out.

A woman at this time can register. Signs of toxicosis persist.

10 week

At this time, they talk about the end of the first critical period. The membranes between the fingers disappear, the kidneys begin to function, a diaphragm is formed.

Toxicosis goes away, but there are changes in the figure, although others can not yet identify the pregnancy "by eye".

11 week

During this period, the study of the child begins through ultrasound screening.

The proportions of the body change, the rudiments of teeth and nails appear. Symptoms that bother a woman: flatulence, heartburn, constipation.

12 week

Fruit length is about 9 cm, weight - 20 g.

The child begins to move his arms and legs, hands and fingers. Leukocytes - white blood cells - are formed.

13 week

By the beginning of the second trimester, the baby already has a size of 7-10 cm and weighs 20-30 g.

The main organ systems are laid. Parts of the face take their final position and are fixed. The first hairs are pecked, and the number of milk teeth is 20.

The head is still large, but the trunk is actively beginning to grow. With his hands, the child can reach the face and even take a finger in his mouth. The tummy of a pregnant woman becomes more rounded.

14 week

The child's height is about 13 cm, weight is 45 g.

The genitals are formed: the prostate in boys and the ovaries in girls. The palate finishes forming and the reflex sucking function is activated. The pancreas and pituitary gland begin their work. Insulin is synthesized.

15 week

The baby reaches a weight of 70 g. Its size can be compared to a large apple.

The primary hairline is formed all over the body. Thanks to them, it is kept warm. The child can control the facial expression - facial expressions are actively manifested, although so far it is not in any way interconnected with the child's emotions. The baby is actively moving, but the mother still cannot feel it. A unique pattern appears on the fingertips.

On the belly of a pregnant woman, age spots may appear.

16 week

The skeleton is strengthened, the vessels of the umbilical cord are formed - a vein and two arteries. Around them is a gelatinous substance that performs a protective function. Eggs are produced in girls.

17 week

The length of the child's body is up to 13 cm, weight is about 150 g.

The body becomes relatively proportional, the arms and legs are lengthened. Subcutaneous fat is deposited, sweat glands develop. The placenta actively supports the baby's vital functions, supplies the necessary substances and removes metabolic products. The blood contains immunoglobulin and interferon - protective substances. Branching of blood vessels occurs.

A symptom that a woman can notice is tachycardia.

18 week

The size of the baby is commensurate with bell pepper, weight - up to 250 g.

At this time, the child begins to hear. He can distinguish between the voices of his parents and may be intimidated by a harsh sound. The endocrine system undergoes the greatest changes.

For the first time, mom can feel a wiggle in her tummy.

19 week

Height - about 25 cm, weight - up to 300 g.

The baby's body is covered with a special lubricant, which helps to regulate body temperature. The molars are laid, the body becomes more symmetrical and proportional.

Mom can feel pulling pains in the lower abdomen.

20 week

Mid pregnancy.

The kid actively flexes and unbends his arms and legs, the sebaceous glands work. With the help of medical equipment, you can listen to the heartbeat.

Mom has shortness of breath and frequent urination.

21 week

The child grows up to 25 cm and weighs about 400 g.

The stomach adapts to digesting "food" that comes from the placenta. Taste receptors are formed, the composition of the blood becomes more varied.

22 week

The baby weighs about half a kilogram.

The brain greatly increases in size. The skin ceases to be transparent. Nerve endings mature, due to which the child can distinguish touch.

23 week

Brain cells are actively developing and begin to regulate the functioning of the body. A special substance is formed in the lungs, which ensures the "breathing" of the baby. By this time, he can already breathe at a rate of 50-60 respiratory movements per minute.

Mom has a feeling of heaviness and discomfort in the lower back and joints.

24 week

The child already reaches 33 cm in length and weighs 600 g.

The formation of the inner ear, including the vestibular apparatus, comes to an end. The child distinguishes between top and bottom.

The weight of the expectant mother is growing rapidly, and swelling may appear.

25 week

The baby's height is about 32 cm, weight - up to 750 g.

The baby's first stool is formed in the large intestine. Bones and joints are strengthened. It is determined whether the child will be right-handed or left-handed.

The mother's well-being noticeably worsens due to a possible iron deficiency. At this time, it is advisable to see a doctor and take certain tests.

26 week

The length of the baby's body is 34 cm, weight - 900 g.

The lungs are actively developing, a substance is formed that protects them from sticking together. The child "observes" the mode of sleep and wakefulness. Mom senses when the baby calms down, and when - actively moves.

27 week

The child reaches his first kilogram, his height remains the same for now.

Hormones are actively synthesized in the child's body. The kid begins to determine the most comfortable position. Mom can feel movements in her stomach that resemble hiccups, but soundless.

The greatest reaction is given by the mother's legs: tingling, goose bumps, and sometimes cramps occur.

28 week

The child already knows how to open and close his eyes. The preliminary eye color was determined - the iris is partially colored. The membrane of the pupils is eliminated, the sensitivity to light increases.

29 week

The child grows up to 37 cm, and also "gets better" until 1300.

All organs and systems develop, the baby is able to show his "likes" and "dislikes" by his reaction to food, light and sound. The kidneys are able to excrete urine.

30 week

The child begins to grow more and more actively, due to which his mobility decreases. The skin becomes thicker and turns pale, acquiring the usual pinkish tint, folds are smoothed out, nerve fibers are formed.

31 weeks

Already a large baby is in the embryo position. The reproductive system continues to form, the clitoris develops in girls, and in boys the testicles begin to move into the scrotum. The liver copes with its direct function - to cleanse the bloodstream of toxins.

32 week

Almost all organs are finally formed. The exception is the lungs. At this time, most children are born healthy and fit for life.

33 week

The child's activity decreases even more, because his weight is already about 2 kg. He becomes cramped in the mother's tummy. The cardiovascular system improves, the vascular tone improves, the cheeks are rounded. The alveoli in the lungs are almost completely formed.

Many babies adjust to their mother's regime and mood.

34 week

The original grease changes its consistency and thickens. A large amount of it accumulates under the armpits, behind the ears. The hair on the head becomes silky and filled with pigment.

The mother's muscles are preparing for possible childbirth, so false contractions may occur. At this time, it is advisable to decide on the way the baby is born - the likelihood and necessity of a cesarean section is discussed.

35 week

Most babies are in the correct position. The child's height is about 48 cm. The immune system improves, the mineral and water-salt balance is achieved. All forces are aimed at thickening the fat layer and strengthening the muscles. The shoulders stand out clearly.

36 week

The child's body is already formed, so it undergoes all the changes that can help it to overcome the birth canal more easily and faster. The sucking muscles are activated, the fat layer increases. The liver stores iron intensively.

37 week

The movements of the fingers become clearer - the grasping reflex develops, the primary hairline disappears. Muscles become toned, the child turns and raises his head, the intestines contract. The mucous membranes of the internal organs are covered with villi. The hormone cortisone "supplements" the lungs.

38 week

The baby's skin turns pale pink. All organs are finally formed, the child is ready to be born. He is capable of performing several dozen reflex movements. The boy's testicles should descend into the scrotum.

39 week

The genitals are finally formed. The hardened marigolds protrude beyond the edge of the fingers. Cartilage is strengthened. Many women can lose water and have labor pains.

In the womb, the child does not idle at all - he continuously grows and develops in order to be born healthy and strong. Every week the baby pleases with a new achievement, which, however, are not immediately noticeable to either the mother or the doctors. From the middle of the third trimester, the baby sharply feels the mood, feelings and emotions of the mother, therefore it is very important not to be nervous, to pamper and delight himself and prepare for the future parenting role.

Specially for- Elena Kichak

Expectant mothers are always curious about how the development of the fetus is going at a time when it is awaited so impatiently. Let's talk and look at photos and pictures, how the fetus grows and develops week by week.

What does a belly stomach do for 9 months in a mom's tummy? What does he feel, see and hear?

Pregnancy: fetal development by week

Let's start the story about the development of the fetus week by week from the very beginning - from the moment of fertilization. A fetus up to 8 weeks of age is called embryo, this occurs before the formation of all organ systems.

Embryo development: 1st week

The egg cell is fertilized and begins to actively divide. The egg is sent to the uterus, freeing itself from the membrane along the way.

On the 6-8th days it is carried out implantation eggs are implanted into the uterus. The egg settles on the surface of the uterine lining and, using chorionic villi, attaches to the uterine lining.

Embryo development: 2-3 weeks

Picture of the development of the embryo at the 3rd week.

The embryo is actively developing, starting to detach from the membranes. At this stage, the rudiments of the muscular, bone and nervous systems are formed. Therefore, this period of pregnancy is considered important.

Embryo development: 4-7 weeks

Fetal development by week in pictures: week 4

week 4

Photo of the embryo before the 6th week of pregnancy.

The embryo forms a heart, head, arms, legs and tail... The branchial cleft is determined. The length of the embryo in the fifth week reaches 6 mm.

Fetal development by week photo: week 5

At the 7th week, the rudiments of the eyes, abdomen and chest are determined, and fingers appear on the handles. The baby already has a sense organ - the vestibular apparatus. Embryo length - up to 12 mm.

Fetal development: 8th week

Fetal development by week photo: week 7-8

The face of the fetus is determined, you can distinguish the mouth, nose, ears. The head of the embryo is large and its length corresponds to the length of the body; the fetal body is formed. All significant, but not yet fully formed, elements of the baby's body already exist. The nervous system, muscles, skeleton continue to improve.

The development of the fetus in the photo is already sensitive arms and legs: week 8

The fetus has skin tenderness in the mouth (preparation for the sucking reflex), and later in the area of ​​the face and palms.

At this stage of pregnancy, the genitals are already visible. The branchial clefts die off. The fruit reaches 20 mm in length.

Fetal development: 9-10 weeks

Fetal development by week photo: week 9

Fingers and toes are already with marigolds. The fetus begins to move in the belly of the pregnant woman, but the mother does not yet feel it. With a special stethoscope, you can hear the baby's heartbeat. Muscles continue to develop.

Fetal development by week photo: week 10

The entire surface of the fetal body is sensitive and the baby is happy to develop tactile sensations, touching his own little body, the walls of the fetal bladder and the umbilical cord. It is very curious to observe this on an ultrasound scan. By the way, the baby first moves away from the ultrasound sensor (of course, because he is cold and unusual!), And then puts his palms and heels trying to touch the sensor.

It's amazing when a mother puts her hand to her belly, the baby tries to master the world and tries to touch his hand "on the back side".

Fetal development: 11-14 weeks

Development of the fetus in the photo of the leg: week 11

The baby has formed arms, legs and eyelids, and the genitals become distinguishable (you can find out the gender of the baby). The fetus begins to swallow, and if something is not to his taste, for example, if something bitter gets into the amniotic fluid (mother has eaten something), then the baby will frown and stick out his tongue, making fewer swallowing movements.

The skin of the fruit looks transparent.

Fetal development: week 12

Photo of the fetus 12 weeks on 3d ultrasound

Fetal development by week photo: week 14

The kidneys are responsible for the production of urine. Blood forms inside the bones. And hairs begin to grow on the head. The movement is already more coordinated.

Fetal development: 15-18 weeks

Fetal development by week photo: week 15

The skin turns pink, the ears and other parts of the body, including the face, are already visible. Imagine that a child can already open his mouth and blink, as well as make grasping movements. The fetus begins to actively push in the mother's tummy. The sex of the fetus can be determined by ultrasound.

Fetal development: 19-23 weeks

Fetal development by week photo: week 19

The kid sucks his thumb, becomes more energetic. In the intestines of the fetus, pseudo-feces are formed - meconium, the kidneys begin to work. During this period, the brain is developing very actively.

Fetal development by week photo: week 20

The auditory bones are stiff and are now able to conduct sounds, the baby hears his mother - heartbeat, breathing, voice. The fruit is gaining weight intensively, fatty deposits are formed. The weight of the fruit reaches 650 g, and the length is 300 mm.

The lungs at this stage of fetal development are so developed that the baby in the artificial conditions of the intensive care unit can survive.

Fetal development: 24-27 weeks

The lungs continue to develop. Now the baby is already falling asleep and waking up. The vellus hairs appear on the skin, the skin becomes wrinkled and covered with lubricant. The cartilage of the ears and nose is still soft.

Fetal development by week photo: week 27

The lips and mouth become more sensitive. The eyes develop, open slightly and can perceive light and squint from direct sunlight. In girls, the labia majora do not yet cover the small ones, and in boys, the testicles have not yet descended into the scrotum. The weight of the fruit reaches 900-1200 g, and the length is 350 mm.

9 out of 10 children born at this time survive.

Fetal development: 28-32 weeks

The lungs are now adapted to breathe normal air. Rhythmic breathing and body temperature are controlled by the central nervous system. The baby can cry and respond to external sounds.

The child opens his eyes while awake and closes during sleep.

The skin becomes thicker, smoother and more pinkish. Starting from this period, the fetus will actively gain weight and grow rapidly. Almost all babies born prematurely at this time are viable. The weight of the fruit reaches 2500 g, and the length is 450 mm.

Fetal development: 33-37 weeks

Fetal development by week photo: week 36

The fruit reacts to the light source. Muscle tone increases and the baby can turn and raise his head. On which, the hairs become silky. The child develops a grasping reflex. The lungs are fully developed.

Fetal development: 38-42 weeks

The fruit is quite developed, ready for birth and is considered mature. The baby has perfected more than 70 different reflex movements. Due to the subcutaneous fatty tissue, the baby's skin is pale pink. The head is covered with hairs up to 3 cm.

Fetal development by week photo: week 40

The kid perfectly mastered the movements of the mother, knows when she is calm, excited, upset and reacts to it with her movements. During the prenatal period, the fetus gets used to movement in space, so babies love so much when they are carried in their arms or rolled in a stroller. This is a completely natural state for a baby, so he will calm down and fall asleep when he is rocked.

Nails protrude beyond the tips of the fingers, the cartilages of the ears and nose are elastic. In boys, the testicles descended into the scrotum, and in girls, the labia majora cover the small ones. The weight of the fruit reaches 3200-3600 g, and the length is 480-520 mm.

After the birth, the baby yearns for the touch of his little body, because at first he cannot feel himself - the arms and legs do not obey the child as confidently as they did in the amniotic fluid. Therefore, so that your baby does not feel lonely, it is advisable to carry him in your arms, to hug him, stroking his body.

And further, the baby remembers the rhythm and sound of your heart very well... Therefore, you can comfort the baby like this - take him in your arms, put him on the left side and your miracle will calm down, stop crying and fall asleep. And for you, at last, the time of bliss will come.

Pregnancy Is a physiological process in which a new organism develops in the uterus, which has arisen as a result of fertilization. Pregnancy lasts an average of 40 weeks (10 obstetric months).

In the intrauterine development of the child, two periods are distinguished.:

1. Embryonic(up to 8 weeks of pregnancy inclusive). At this time, the embryo is called an embryo and takes on the characteristics of a person;
2. Fetal(from 9 weeks to the very birth). At this time, the embryo is called the fetus.

The growth of the child, the formation of his organs and systems occurs naturally in different periods of intrauterine development, which is subordinated to the genetic code embedded in the germ cells and fixed in the process of human evolution.

Development of the embryo in the first obstetric month (1-4 weeks)

First week (1-7 days)

Pregnancy starts from the moment fertilization- the fusion of a mature male cell (sperm) and a female egg. This process usually takes place in the ampulla of the fallopian tube. After a few hours, the fertilized egg begins to divide exponentially and descends through the fallopian tube into the uterine cavity (this path takes up to five days).

As a result of division a multicellular organism is obtained, which looks like a blackberry (in Latin "morus"), which is why the embryo at this stage is called morula... Approximately on the 7th day, morula is introduced into the wall of the uterus (implantation). The villi of the outer cells of the embryo are connected to the blood vessels of the uterus, subsequently the placenta is formed from them. The other outer cells of the morula give rise to the development of the umbilical cord and membranes. After a while, various tissues and organs of the fetus will develop from the internal cells.

Information At the time of implantation, a woman may have small bleeding from the genital tract. Such discharge is physiological and does not require treatment.

Second week (8-14 days)

The outer cells of the morula grow tightly into the lining of the uterus. In the embryo the formation of the umbilical cord, placenta begins, and neural tube, from which the fetal nervous system subsequently develops.

Third week (15-21 days)

The third week of pregnancy is a difficult and important period.... At that time important organs and systems begin to form fetus: the rudiments of the respiratory, digestive, circulatory, nervous and excretory systems appear. In the place where the fetal head will soon appear, a wide plate is formed, which will give rise to the brain. On day 21, the child's heart begins to beat.

Fourth week (22-28 days)

This week the laying of fetal organs continues... The rudiments of the intestines, liver, kidneys and lungs are already present. The heart starts to work more intensively and pumps more blood through the circulatory system.

From the beginning of the fourth week in the embryo body folds appear, and appears spinal rudiment(chord).

By the 25th day ends neural tube formation.

By the end of the week (approximately 27-28 days) the muscular system, the spine are formed, which divides the embryo into two symmetrical halves, and the upper and lower limbs.

During this period begins formation of pits on the glans, which will later become the eyes of the fetus.

Development of the embryo in the second obstetric month (5-8 weeks)

Fifth week (29-35 days)

During this period, the embryo weighs about 0.4 grams, length 1.5-2.5 mm.

The formation of the following organs and systems begins:

1. Digestive system: liver and pancreas;
2. Respiratory system: larynx, trachea, lungs;
3. Circulatory system;
4. Reproductive system: precursors of germ cells are formed;
5. Sense organs: The formation of the eyes and inner ear continues;
6. Nervous system: the formation of brain regions begins.

At that time a subtle umbilical cord appears... The formation of limbs continues, the first rudiments of nails appear.

On the face upper lip and nasal cavities are formed.

Sixth week (36-42 days)

Length embryo during this period is about 4-5 mm.

The sixth week begins placenta formation... At this time, it is just beginning to function, blood circulation between it and the embryo has not yet been formed.

Continues the formation of the brain and its departments... At the sixth week, when performing an encephalogram, it is already possible to record signals from the fetal brain.

Begins the formation of facial muscles... The eyes of the fetus are already more pronounced and uncovered by the eyelids, which are just beginning to form.

In this period, begin change upper limbs: they lengthen and the rudiments of the hands and fingers appear. The lower limbs remain in their infancy for now.

Important organs are changing:

1. Heart... The division into chambers is completed: ventricles and atria;
2. Urinary system... Primary kidneys have formed, the development of the ureters begins;
3. Digestive system... The formation of parts of the gastrointestinal tract begins: the stomach, small and large intestines. By this period, the liver and pancreas had practically completed their development;

Seventh week (43-49 days)

The seventh week is significant in that the final the formation of the umbilical cord is completed and the uteroplacental circulation is established. Now respiration and nutrition of the fetus will be carried out due to the circulation of blood through the vessels of the umbilical cord and placenta.

The embryo is still bent arcuate, there is a small tail on the pelvic part of the body. The size of the head is not less than the entire half of the embryo. The length from the crown to the sacrum grows by the end of the week up to 13-15 mm.

Continues upper limb development... The fingers are visible quite clearly, but their separation has not yet occurred. The child begins to perform spontaneous movements with his hands in response to stimuli.

Good eyes are formed, already covered with eyelids, which protect them from drying out. The child can open his mouth.

The nasal folds and nose are laid, two paired elevations are formed on the sides of the head, from which they will begin to develop auricles.

Intense development of the brain and its departments.

Eighth week (50-56 days)

The body of the embryo begins to straighten length from the crown to the coccyx is 15 mm at the beginning of the week and 20-21 mm at 56 days.

Continues the formation of important organs and systems: Digestive system, heart, lungs, brain, urinary system, reproductive system (boys develop testicles). The organs of hearing are developing.

By the end of the eighth week a child's face becomes familiar to a person: well-defined eyes, covered with eyelids, nose, auricles, lip formation ends.

Intensive growth of the head, upper and lower horses is noted ossification of the long bones of the arms and legs and the skull develops. The fingers are clearly visible, there is no longer a skin membrane between them.

Additionally The eighth week ends with the embryonic period of development and the fetal period begins. The embryo from this time on is called the fetus.

Fetal development in the third obstetric month (9-12 weeks)

Ninth week (57-63 days)

At the beginning of the ninth week coccygeal-parietal size the fetus is about 22 mm, by the end of the week - 31 mm.

Is happening improvement of blood vessels of the placenta, which improves uteroplacental blood flow.

The development of the musculoskeletal system continues... The process of ossification begins, the joints of the toes and hands are formed. The fetus begins to make active movements, it can squeeze the fingers. The head is lowered, the chin is closely pressed to the chest.

Changes occur in the cardiovascular system... The heart beats up to 150 beats per minute and pumps blood through its blood vessels. The composition of blood is still very different from that of an adult: it consists only of red blood cells.

Continues further growth and development of the brain, structures of the cerebellum are formed.

The organs of the endocrine system are intensively developing in particular, the adrenal glands, which produce important hormones.

Cartilage tissue is being improved: auricles, laryngeal cartilage, vocal cords are being formed.

Tenth week (64-70 days)

By the end of the tenth week fruit length from the coccyx to the crown is 35-40 mm.

The buttocks begin to develop, the previously existing tail disappears. The fetus is in the uterus in a fairly free position in a bent state.

The development of the nervous system continues... Now the fetus performs not only chaotic movements, but also reflex movements in response to a stimulus. When accidentally touching the walls of the uterus, the child makes movements in response: turns his head, bends or unbends his arms and legs, pushes to the side. The size of the fetus is still very small, and the woman cannot yet feel these movements.

A sucking reflex is formed, the child begins to reflex lips movements.

The development of the diaphragm ends, which will take an active part in breathing.

Eleventh week (71-77 days)

By the end of this week coccygeal-parietal size the fetus increases to 4-5 cm.

The fetal body remains disproportionate: small torso, large head sizes, long arms and short legs, bent at all joints and pressed to the stomach.

The placenta has already reached sufficient development and copes with its functions: it provides oxygen and nutrients to the fetus and removes carbon dioxide and metabolic products.

Further formation of the fetal eyes occurs: at this time, the iris develops, which will further determine the color of the eyes. The eyes are well developed, half-closed for centuries or wide open.

Twelfth week (78-84 days)

Coccygeal-parietal size the fetus is 50-60 mm.

Goes distinctly the development of the genitals in a female or male pattern.

Is happening further improvement of the digestive system. The intestines are extended in length and fit in loops, like in an adult. Its periodic contractions begin - peristalsis. The fetus begins to swallow, swallowing amniotic fluid.

The development and improvement of the fetal nervous system continues... The brain is small in size, but it exactly repeats all the structures of the adult brain. The large hemispheres and other departments are well developed. Reflex movements are improved: the fetus can clench and unclench the fingers into a fist, grabs the thumb and actively sucks it.

In the blood of the fetus not only erythrocytes are already present, but the production of white blood cells - leukocytes - begins.

At this time, the child single respiratory movements begin to be recorded. Before birth, the fetus cannot breathe, its lungs do not function, but it makes rhythmic movements of the chest, imitating breathing.

By the end of the week, the fetus eyebrows and eyelashes appear, the neck is clearly visible.

Fetal development in the fourth obstetric month (13-16 weeks)

13 week (85-91 days)

Coccygeal-parietal size by the end of the week is 70-75 mm. The proportions of the body begin to change: the upper and lower limbs and the trunk are lengthened, the dimensions of the head are no longer so large in relation to the body.

The improvement of the digestive and nervous systems continues. The embryos of milk teeth begin to appear under the upper and lower jaws.

The face is fully formed, the ears, nose and eyes are clearly visible (completely closed by the eyelids).

14 week (92-98 days)

Coccygeal-parietal size by the end of the fourteenth week increases up to 8-9 cm... The proportions of the body continue to change to more familiar proportions. The forehead and nose are well defined on the face, cheeks and chin appear. The first hairs appear on the head (very thin and colorless). The surface of the body is covered with vellus hairs, which retain the lubrication of the skin and thereby perform protective functions.

Improves the musculoskeletal system of the fetus... Bones become stronger. Motor activity increases: the fetus can roll over, bend, make swimming movements.

The development of the kidneys, bladder and ureters ends... The kidneys begin to secrete urine, which mixes with the amniotic fluid.

: the cells of the pancreas begin to work, producing insulin, and the cells of the pituitary gland.

Changes in the genitals appear... In boys, the prostate gland is formed, in girls, the ovaries migrate into the pelvic cavity. At the fourteenth week, with a good sensitive ultrasound machine, it is already possible to determine the sex of the child.

Fifteenth week (99-105 days)

Coccygeal-parietal size of the fetus is about 10 cm, fetal weight - 70-75 grams. The head is still quite large, but the growth of arms, legs and trunk begins to outstrip it.

The circulatory system is improved... In a child in the fourth month, it is already possible to determine the blood group and Rh factor. Blood vessels (veins, arteries, capillaries) grow in length, their walls are strengthened.

The production of original feces (meconium) begins. This is due to the ingestion of amniotic fluid, which enters the stomach, then into the intestines and fills it.

Fingers and toes fully formed, an individual pattern appears on them.

Sixteenth week (106-112 days)

The weight of the fetus increases to 100 grams, the coccygeal-parietal size - up to 12 cm.

By the end of the sixteenth week, the fetus is already fully formed., he has all the organs and systems. The kidneys are actively working, every hour a small amount of urine is released into the amniotic fluid.

The skin of the fetus is very thin, subcutaneous adipose tissue is practically absent, therefore blood vessels are visible through the skin. The skin looks bright red, covered with vellus hairs and grease. Eyebrows and eyelashes are well defined. Nails are formed, but they cover only the edge of the nail phalanx.

Expression muscles are formed, and the fetus begins to "grimace": frowning of the eyebrows, a semblance of a smile, is observed.

Fetal development in the fifth obstetric month (17-20 weeks)

Seventeenth week (113-119 days)

The weight of the fetus is 120-150 grams, the coccygeal-parietal size is 14-15 cm.

The skin remains very thin, but subcutaneous fatty tissue begins to develop under it. The development of milk teeth, which are covered with dentin, continues. Under them, embryos of permanent teeth begin to form.

There is a reaction to sound stimuli... From this week on, we can say for sure that the child began to hear. When strong sharp sounds appear, the fetus begins to actively move.

The position of the fetus changes... The head is up and is in an almost vertical position. The arms are bent at the elbow joints, the fingers are clenched into a fist almost all the time. From time to time, the baby begins to suck on the thumb.

Heartbeat becomes distinct... From now on, the doctor can listen to him with a stethoscope.

Eighteenth week (120-126 days)

The child's weight is about 200 grams, the length is up to 20 cm.

The formation of a sleep and wakefulness regime begins... Most of the time, the fetus sleeps, movements stop at this time.

At this time, a woman may already begin to feel the movement of the child, especially with repeated pregnancies. The first movements are felt as gentle jolts. A woman can feel more active movements during excitement, stress, which affects the emotional state of the child. At this time, the norm is about ten episodes of fetal movement per day.

Nineteenth week (127-133 days)

The child's weight increases to 250-300 grams, body length - up to 22-23 cm. The proportions of the body change: the head lags behind in growth from the body, arms and legs begin to lengthen.

Movements become more frequent and palpable... They can be felt not only by the woman herself, but also by other people, putting their hand to the stomach. Primary pregnant women at this time can only begin to feel the movements.

The endocrine system is improving: the pancreas, pituitary gland, adrenal glands, gonads, thyroid and parathyroid glands are actively functioning.

The composition of the blood has changed: in addition to erythrocytes and leukocytes, there are monocytes and lymphocytes in the blood. The spleen begins to take part in hematopoiesis.

Twentieth week (134-140 days)

Body length increases to 23-25 ​​cm, weight - up to 340 grams.

The fetal skin is still thin, covered with protective grease and vellus hairs that can persist until the very birth. Subcutaneous adipose tissue develops intensively.

Well formed eyes, at twenty weeks, the blink reflex begins to appear.

Improved movement coordination: baby confidently brings a finger to his mouth and begins to suck. Facial expressions are expressed: the fetus can close its eyes, smile, frown.

By this week, all women are already feeling the movement., regardless of the number of pregnancies. The activity of movements changes during the day. When irritants appear (loud sounds, stuffy room), the child begins to move very violently and actively.

Fetal development in the sixth obstetric month (21-24 weeks)

Twenty-first week (141-147 days)

Body weight grows up to 380 grams, fetal length - up to 27 cm.

The subcutaneous tissue layer increases... The skin of the fetus is wrinkled, with many folds.

Fetal movements are becoming more active and tangible. The fetus moves freely in the uterine cavity: lies downside down or buttocks, across the uterus. Can pull the umbilical cord, push off with hands and feet from the walls of the uterus.

Sleep and wakefulness changes... Now the fetus spends less time in sleep (16-20 hours).

Twenty-second week (148-154 days)

At 22 weeks, the size of the fetus increases to 28 cm, weight - up to 450-500 grams. The dimensions of the head become proportional to the body and limbs. The legs are bent almost all the time.

The fetal spine is fully formed: it has all the vertebrae, ligaments and joints. The process of strengthening the bones continues.

Improves the nervous system of the fetus: the brain already contains all the nerve cells (neurons) and has a mass of about 100 grams. The child begins to take an interest in his body: he feels his face, arms, legs, tilts his head, brings his fingers to his mouth.

The size of the heart increases significantly, the functional capabilities of the cardiovascular system are being improved.

Twenty-third week (155-161 days)

The body length of the fetus is 28-30 cm, weight is about 500 grams... Pigment begins to synthesize in the skin, as a result, the skin acquires a bright red color. The subcutaneous adipose tissue is still quite thin, as a result, the child looks very thin and wrinkled. The lubricant covers the entire skin, and is more abundant in the folds of the body (elbow, axillary, inguinal, and other folds).

The development of internal genital organs continues: in boys - the scrotum, in girls - the ovaries.

Respiratory rate increases up to 50-60 times per minute.

Swallowing reflex is still well developed: the child constantly swallows amniotic fluid with particles of protective skin lubricant. The liquid part of the amniotic fluid is absorbed into the blood, a thick green-black substance (meconium) remains in the intestine. Normally, the intestines should not be emptied before the baby is born. Sometimes the swallowing of water causes hiccups in the fetus, the woman can feel it in the form of rhythmic movements for several minutes.

Twenty-fourth week (162-168 days)

By the end of this week, the weight of the fetus increases to 600 grams, body length - up to 30-32 cm.

The movements become stronger and more precise.... The fetus takes up almost all the space in the uterus, but it can still change position and turn over. Muscles grow vigorously.

By the end of the sixth month, the child has well-developed sense organs. Vision begins to function. If a bright light hits a woman's belly, the fetus begins to turn away, tightly squeezes the eyelids. Hearing is well developed. The fetus detects pleasant and unpleasant sounds for itself and reacts to them in different ways. With pleasant sounds, the child behaves calmly, his movements become calm and measured. With unpleasant sounds, it begins to freeze or, conversely, moves very actively.

An emotional bond is established between mother and child.... If a woman experiences negative emotions (fear, anxiety, melancholy), the child begins to experience similar feelings.

Fetal development in the seventh obstetric month (25-28 weeks)

Twenty-fifth week (169-175 days)

The length of the fetus is 30-34 cm, body weight increases to 650-700 grams. The skin becomes elastic, the number and severity of folds decreases due to the accumulation of subcutaneous fatty tissue. The skin remains thin with many capillaries giving it a red coloration.

The face looks familiar to humans: well-defined eyes, eyelids, eyebrows, eyelashes, cheeks, auricles. The cartilage of the ears is still thin and soft, their curves and curls are not fully formed.

Bone marrow develops intensively, which takes on a major role in hematopoiesis. The strengthening of the bones of the fetus continues.

Important processes take place in the maturation of the lungs: small elements of lung tissue (alveoli) are formed. Before the baby is born, they are without air and resemble deflated balls, which unfold only after the first cry of the newborn. From the 25th week, the alveoli begin to produce a special substance (surfactant) necessary to maintain their shape.

Twenty-sixth week (176-182 days)

Fruit length is about 35 cm, weight increases to 750-760 grams. The growth of muscle tissue and subcutaneous adipose tissue continues. Bones are strengthened and permanent teeth continue to develop.

The formation of genitals continues... In boys, the testicles begin to descend into the scrotum (the process lasts 3-4 weeks). In girls, the formation of the external genital organs and the vagina is completed.

The senses are improved... The child develops a sense of odors (sense of smell).

Twenty-seventh week (183-189 days)

Weight increases to 850 grams, body length - up to 37 cm.

The organs of the endocrine system are actively functioning in particular the pancreas, pituitary gland and thyroid gland.

The fetus is active enough, makes various movements freely inside the uterus.

From the twenty-seventh week of the child an individual metabolism begins to form.

Twenty-eighth week (190-196 days)

The child's weight increases to 950 grams, body length - 38 cm.

By this age the fetus becomes practically viable... In the absence of organ pathology, a child with good care and treatment can survive.

Subcutaneous fat continues to accumulate... The skin is still red in color, vellus hair begins to gradually fall out, remaining only on the back and shoulders. Eyebrows, eyelashes, hair on the head become darker. The child begins to open his eyes often. The cartilage of the nose and ears remains soft. The nails have not yet reached the edge of the nail phalanx.

This week starts over to actively function one of the cerebral hemispheres. If the right hemisphere becomes active, then the child becomes left-handed, if the left, then right-handedness develops.

Fetal development in the eighth month (29-32 weeks)

Twenty-ninth week (197-203 days)

The weight of the fetus is about 1200 grams, the growth increases to 39 cm.

The child has already grown up enough and takes up almost all the place in the uterus. Movements become less chaotic. The movements are manifested in the form of periodic jolts with the legs and arms. The fetus begins to occupy a definite position in the uterus: with the head or buttocks down.

All organ systems continue to improve... The kidneys excrete up to 500 ml of urine per day. The load of the cardiovascular system increases. Fetal circulation is still significantly different from that of a newborn.

Thirty week (204-210 days)

Body weight increases to 1300-1350 grams, growth remains about the same - about 38-39 cm.

Subcutaneous fatty tissue constantly accumulates, the skin folds are straightened. The child adapts to the lack of space and takes a certain position: folds, arms and legs crossed. The skin is still brightly colored, the amount of lubricant and vellus hair is decreasing.

Alveoli development and surfactant production continues... The lungs prepare for the birth of the baby and the beginning of breathing.

The development of the head brain, the number of convolutions and the area of ​​the cortex increases.

Thirty-first week (211-217 days)

The child's weight is about 1500-1700 grams, the height increases to 40 cm.

The child's sleep and wakefulness patterns change... Sleep still takes a long time, at this time there is no fetal motor activity. During wakefulness, the child actively moves and pushes.

Eyes fully formed... During sleep, the child closes his eyes, while awake, the eyes are open, and occasionally the child blinks. The color of the iris in all children is the same (blue), then after birth it begins to change. The fetus reacts to bright light by constricting or dilating the pupil.

The size of the brain increases... Now its volume is about 25% of the brain volume of an adult.

Thirty-second week (218-224 days)

The child is about 42 cm tall and weighs 1700-1800 grams.

The accumulation of subcutaneous fat continues, in this connection, the skin becomes lighter, almost no folds remain on it.

Internal organs are improved: organs of the endocrine system intensively secrete hormones, surfactant accumulates in the lungs.

The fetus produces a special hormone, which promotes the formation of estrogen in the mother's body, as a result, the mammary glands begin to prepare for milk production.

Fetal development in the ninth month (33-36 weeks)

Thirty third week (225-231 days)

The weight of the fetus increases to 1900-2000 grams, the growth is about 43-44 cm.

The skin becomes lighter and smoother, the layer of adipose tissue increases. Fluffy hair is increasingly wiped off, the layer of protective lubricant, on the contrary, increases. Nails grow to the edge of the nail phalanx.

The child becomes more and more cramped in the uterine cavity, so his movements become more rare, but strong. The position of the fetus is fixed (with the head or buttocks down), the likelihood that the child will turn over after this period is extremely small.

The work of internal organs is being improved more and more.: the mass of the heart increases, the formation of alveoli is almost completed, the tone of the blood vessels increases, the brain is fully formed.

Thirty-fourth week (232-238 days)

Child's weight ranges from 2000 to 2500 grams, height is about 44-45 cm.

The child now takes a stable position in the uterus.... The bones of the skull are soft and mobile thanks to the fontanelles, which can close only a few months after birth.

Head hair grows intensively and take on a certain color. However, hair color may change after childbirth.

Intensive strengthening of bones is noted, in this regard, the fetus begins to take calcium from the mother's body (a woman at this time may notice the appearance of seizures).

The baby constantly swallows amniotic fluid, thereby stimulating the gastrointestinal tract and kidney function, which secrete at least 600 ml of clear urine per day.

Thirty-fifth week (239-245 days)

Every day the child adds 25-35 grams. Weight in this period can vary greatly and by the end of the week it is 2200-2700 grams. Growth increases to 46 cm.

All internal organs of the child continue to improve, preparing the body for the upcoming extrauterine existence.

Fatty tissue is intensively deposited, the child becomes more plump. The amount of vellus hair is greatly reduced. The nails have already reached the tips of the nail phalanges.

A sufficient amount of meconium has already accumulated in the intestines of the fetus., which should normally leave within 6-7 hours after childbirth.

Thirty-sixth week (246-252 days)

The weight of a child is very different and can be from 2000 to 3000 grams, height - within 46-48 cm

The fetus already has a well-developed subcutaneous fatty tissue, the skin color becomes light, wrinkles and folds disappear completely.

The baby takes a certain position in the uterus: more often he lies upside down (less often, legs or buttocks, in some cases, transversely), the head is bent, the chin is pressed to the chest, arms and legs are pressed to the body.

Skull bones, unlike other bones, remain soft, with cracks (fontanelles), which will allow the baby's head to be more pliable when passing through the birth canal.

All organs and systems are fully developed for the existence of a child outside the womb.

Fetal development in the tenth obstetric month

Thirty-seventh week (254-259 days)

The child's height increases to 48-49 cm, the weight can fluctuate significantly. The skin has become lighter and thicker, the fat layer increases by 14-15 grams per day every day.

Cartilage of the nose and auricles become denser and more elastic.

Fully lungs are formed and mature, the alveoli contain the necessary amount of surfactant for the breathing of the newborn.

The maturation of the digestive system has ended: contractions occur in the stomach and intestines necessary to push food (peristalsis).

Thirty-eighth week (260-266 days)

Child's weight and height vary greatly.

The fetus is fully ripe and ready for birth.... Outwardly, the baby looks like a full-term newborn. The skin is light, the fatty tissue is quite developed, and vellus hair is practically absent.

Thirty-ninth week (267-273 days)

Typically two weeks before delivery the fruit starts to sink pressing against the bones of the pelvis. The child has already reached full maturity. The placenta begins to age gradually and metabolic processes deteriorate in it.

The weight of the fetus increases significantly (30-35 grams per day). The proportions of the body completely change: the chest and shoulder girdle are well developed, the rounded abdomen, long limbs.

The senses are well developed: the child catches all sounds, sees bright colors, can focus vision, taste buds are developed.

Fortieth week (274-280 days)

All indicators of fetal development correspond to the new expected. The baby is completely ready for childbirth. The mass can vary significantly: from 250 to 4000 and more grams.

The uterus begins to contract periodically(), which is manifested by aching pains in the lower abdomen. The cervix opens slightly, and the fetal head is pressed closer to the pelvic cavity.

Skull bones are still soft and pliable, which allows the baby's head to change shape and easier to pass through the birth canal.

Fetal development by weeks of pregnancy - Video