Beauty and health of teeth 

Calendar for pregnant women to find out the exact date. Accurate weekly pregnancy calculator

The need to calculate the gestational age by weeks occurs in almost every pregnant woman and more than once during pregnancy. And this is necessary not only in order to simply know your due date or correctly track the pregnancy calendar. I also want to calculate the duration of pregnancy and childbirth in order not to doubt the correctness of the doctor’s actions, if they make a mistake in the consultation - this can also affect the date of going on maternity leave, you don’t want to work an extra couple of weeks, right?

First, some general information.

Our calculator will help you calculate the obstetric gestational age, it is slightly different from the actual life of the fetus. Gynecologists build all their calculations on the date of the first day of the last menstruation, and do not count from fertilization, this is due to the ease of error in the date of conception.

Ovulation in a woman can significantly shift in time, especially if she does not have a regular cycle, and of course, not everyone can know the exact date of fertilization, it is difficult to calculate the gestational age by ovulation. And the date of the beginning of the last menstruation, as a rule, is known.

We have a special calculator that allows you to independently calculate the gestational age online. He will give you information not only about the obstetric gestational age, but also the date of conception, the age of the fetus, the date of birth.

The problem may arise if yours is not regular. How to correctly calculate the gestational age by menstruation with an irregular cycle? You need to add the length of the last 6 cycles and divide by 6, so you get the average duration, this is the number of days and you need to enter in the calculator field.

All data obtained can be easily controlled using other calculation systems.

You can accurately calculate the gestational age (well, or relatively accurately, as gynecologists think) using the Negele formula. It does not take into account the length of your cycle and therefore the result may differ from the period that our calculator gives, but this will certainly coincide with the calculations of the gynecologist: we subtract 3 months from the first day of the delay in menstruation and add 7 days to the date obtained. This is your due date. Calculate the gestational age by months, weeks and days, as with our calculator, using this formula will not work.

If you had an ultrasound, the doctor measured the development of the baby. Its weight, the length of the bones make it possible to calculate the gestational age by ultrasound, but this calculation is accurate only in the first trimester, the longer the period, the greater the difference in physical development in different children, and the higher the risk of error in determining the timing of pregnancy.

Almost all calculation methods carry a certain risk of error, which is why only 4% of children are born on the PDR (preliminary date of birth).

It is better to evaluate the results of calculations in a complex (ultrasound, date of the last menstruation, first movement and other dates and signs). And still, the date of birth can fall between 37 and 42 weeks of pregnancy.

Most of the fair sex is looking forward to two cherished stripes. And now, as soon as they find out that everything worked out, they have a question: from what day is pregnancy considered? Unfortunately, it is almost impossible to determine with an accuracy of up to a day. The only exception is constant monitoring of ovulation. But it is carried out only during infertility. But there are other ways, the help of which is to more or less correctly calculate the gestational age. These are medical studies, calendar methods, gynecological examinations ... Let's figure out what the existing types of determining the term of a woman's interesting position are.

Consider carefully

Some people believe that the waiting period of a stork represents the amount of time that passes from the moment of conception. This point of view holds because it is quite correct. Only in this case does the term embryonic mean. Usually its duration is 38 weeks. But after all, a little one can ask for this world a little earlier or a little later.

Modern medicine does not take into account the embryonic gestational age, namely obstetric. Its peculiarity is that the first day of the last menstruation is used for counting. This will be the first day of pregnancy. When a woman becomes registered, the doctor enters exactly this date in the exchange card and relies on it when calculating the term.

It is known that ovulation occurs approximately in the middle of the cycle. Because of this, it becomes clear from what day doctors consider pregnancy. And therefore, the difference between the obstetric and embryonic gestation periods is exactly two weeks (the first period is longer than the second). In the first seven days, the egg begins its maturation and preparation for fertilization.

Oh those forty weeks!

Usually pregnancy lasts 40 obstetric weeks. But the appearance of a baby on the terms from the 38th to the 42nd week is also considered the norm. Formally, a pregnancy can be considered premature or overdue, but in reality, childbirth occurs at the time set by nature - exactly on time. Here, of course, the question arises: from what day is pregnancy considered? And such interest is understandable, because the discrepancy in dates lies in the fact that the calculated obstetric period is very average. It can coincide with the embryonic one only when the conception of the baby occurred in the middle of the 28-day cycle. And then, provided that the cycle before pregnancy was regular.

In addition to the usual calculations using the calendar, the doctor can set the date, taking into account the data of ultrasound diagnostics. This will be possible only if the future peanut develops according to all stages of pregnancy.

If the expectant mother believes that the conception did not occur in the middle of the cycle, as happens in most cases, but shortly before its end or at the beginning, she is obliged to notify her gynecologist about this. Then the doctor will correct his calculations in order to determine the EDD (preliminary date of birth) as accurately as possible.

calendar method

This method is designed to control every sexual intercourse. If the unity of bodies does not happen so often, then the woman will definitely understand on which day the fertilization happened. Some potential mothers have taught themselves to measure basal temperature. If they have learned to use the schedule correctly, they should inform their doctor about the day they have withdrawn. Based on this information, the doctor will set an approximate date with an error of two weeks.

From what day is pregnancy considered in this case? The error is based on the fact that people in white coats take into account only the obstetric period, the peculiarity of which is its dependence on the first day of the last menstruation. This is a very accurate technique, and the date of birth is set to within a week. And you can calculate using a simple formula, known for sure to many: the actual day of fertilization + 280 days. Or subtract three months from the day of conception and add seven days. If a potential mother knows the exact day of her ovulation, then only 264 days must be added to the day of conception. This will also be the correct result.

Such a familiar and promising ultrasound

For many years, ultrasound has been used in medicine to monitor the development of the fetus. After all, every expectant mother is very concerned about the question of how to correctly calculate pregnancy. And with the help of ultrasound, you can calculate both the estimated time of conception and childbirth. To get a more accurate result, doctors recommend that a pregnant woman be examined in the first 8 weeks. It is at this stage that each fetus develops in exactly the same way. According to its size, the term is determined.

But then the development of each future little one occurs strictly individually. Body parts and organs may develop slower or faster than the charts suggest. From this we can draw a simple conclusion: the shorter the gestational age, the better and more effective the answer of the examination will be. The doctor checks the result with the data in the table and checks the week of pregnancy. If the ultrasound establishes a delay in the development of the fetus, then a diagnosis will be made about this. And the only thing that can at least slightly accelerate the development of the little one is that the expectant mother will be very attentive to her health.

At the gynecologist's appointment

Some of the women are mistaken when they come to the gynecologist on the first day of the delay, hoping that only he is able to answer whether the pregnancy has occurred or not, and in the case of a positive answer, determine the first day of pregnancy. But at this point, it's impossible to tell. Yes, the uterus will be slightly enlarged, but this may be due to future menstruation. And its increase, associated with the beginning of a new life, will occur only after the second or third week of the delay. The size of the uterus at this stage will be the size of a chicken egg. The peculiarity of examinations by a gynecologist is the same as that of an ultrasound: the shorter the period, the more accurately the exact date of conception will be determined.

Pregnancy with IVF

Every day the number of women who decide on artificial insemination is increasing. This method assumes that the egg will be combined with the sperm, after which specialists will observe them for several days. And here a woman who undergoes such a procedure has the right to ask from what day pregnancy is considered during IVF. And everything is simpler than it might seem: the embryo is planted no earlier than after three to five days. This is when the pregnancy starts.

If a woman has a short cycle, the obstetric period is set from the day of the last menstruation. And if it is long, then there will be some features. The potential mother will start taking medications that block the activity of the ovaries (their stimulation will begin later). Therefore, if we count from the last menstruation, then in real life the development of the fetus will be 3-4 weeks, and the calculated period is 7-8 weeks. Therefore, there is no problem to understand from what day pregnancy is considered - from conception or implantation. Gynecologists are counting from the day the embryo is implanted into the woman's body.

Getting ready to give birth to a healthy baby

Instead of arguing with the doctor about the situation from which day people in white coats consider pregnancy, it is better for the expectant mother to direct all her attention and care to the new life that is growing in her. Indeed, for the development of the baby, not only the physical health of the mother is important, but also the psychological one. A woman should try to experience more positive emotions, breathe fresh air more often, eat more plant foods, eating a lot of seasonal vegetables and fruits.

The state of pregnancy is one of the most joyful moments in the life of every woman. She should try not to spoil her joy from waiting for the baby. The expectant mother should just enjoy her current situation, rest more and remember that the child is happy only when his mother is happy.

One day for every expectant mother comes that very special day. She learns about her new condition. And soon a woman will often hear the question: “What is your (your) deadline?” How to calculate the gestational age to answer correctly?

It's pretty simple!

Almost always, the answer to the question about the gestational age will be based on the two most famous and popular calculation methods - obstetric and embryonic (from conception) terms.

obstetric term

The beginning of pregnancy is the first day of the last menstruation. This method is called obstetric. It does not take into account the individual characteristics of the woman's body, but is almost universal. Any doctor will use it.

The obstetric method has its own logic. The term is calculated from the earliest stage of pregnancy - the beginning of egg maturation.

Using the obstetric method, the doctor will determine the expected date of birth (PDR), as well as the period of maternity leave. In medicine, it is generally accepted that pregnancy lasts 280 days. This is the well-known 40 weeks or 10 lunar months.

Why 10 months and not 9? And why are the months lunar? Astronomy is to blame for this. The moon repeats its phases at intervals of 28 days (4 weeks). This is the lunar month. And if you count in calendar months, then only 9 of them really fit in a normal pregnancy.

Embryonic (true) term - from conception

The beginning of pregnancy is the first day of the last menstruation plus 2 weeks. It is believed that it is in the middle of the cycle that ovulation occurs. In this case, the period from one month to another is taken as an average - 28 days.

This method of calculating the term is called embryonic or true. But it’s worth considering: isn’t the truth hiding somewhere else? From a medical point of view, ovulation can occur within 12-18 days from the start of the cycle.

Example. Oksana's husband from the beginning of spring until late autumn constantly traveled on business trips. At home I was sometimes only one or two days a month. Soon after another visit by her husband, Oksana realized that she was pregnant. And with a smile, I thought that I knew the exact date of conception - June 2. After all, before and after that day, she and her husband did not see each other for almost two weeks. Oksana's last period was May 18-21. And if we consider May 22 as the beginning of the cycle, then the conception took place on the twelfth day. And the egg was already mature. Or not?

Another question is important here - how long does ovulation last? If strictly according to science, then a few seconds. After all, ovulation is only the release of a mature egg from the follicle. But most of us consider ovulation to be the next few (or even many) hours that the egg will live in the female body. How many? Sometimes up to two days. By the way, about the same amount will live in the female body and sperm after intercourse. And sometimes even longer - up to a week.

So the true day of conception is a real mystery! After all, there may well be two different situations. The egg moves to the uterus for the second day and literally at the end of its life it turns out to be fertilized. Or vice versa. Spermatozoa entered the woman's body before ovulation and actually "waited" for the release of the egg.

As accurately as possible, the day of conception is known to couples who carefully planned their pregnancy. In this case, the day of ovulation is determined using a special test (sold in a pharmacy) or by ultrasound.


There is another old method for determining ovulation. This is a measurement of basal temperature. It is carried out in the morning, at the same time, before getting out of bed (it is even recommended not to open your eyes). The thermometer is placed in the mouth, vagina or rectum. Before ovulation, basal body temperature drops slightly and then rises. This means the release of a mature egg.

And sometimes women themselves feel that ovulation has come. The lower abdomen aches, the discharge from the vagina becomes a little more viscous. And the attraction to the beloved man becomes stronger.

That is why many expectant mothers consider their gestational age to be the embryonic method: the beginning of the cycle plus 2 weeks or the day of ovulation known to them. In this case, we are talking about the period from conception.

Can there be difficulties?

Lyudmila's periods often came literally "every other time." The doctor's verdict is ovarian dysfunction. While Luda did not live a sexual life, she was not too worried. But after marriage, the same question often came. Delay is a sign of dysfunction? Or the contraception didn't work? Once the second option turned out to be correct. But the doctors could not calculate the term by the usual method - there was a clear discrepancy.

For the former athlete Valeria, the first menstruation came only at the age of 16. And the cycle was not established in any way. Up to six months could pass between critical days. The girl did not go to the doctor. I somehow didn’t find time - either study, or personal life. One day, thin Valeria noticed that she had clearly gained weight. The first reaction is the desire to go on a strict diet and remember the previous sports loads. It's good that the girl first consulted with her mother. More precisely, with the future grandmother of her child.

Lena's first child had just turned ten months old. The baby grew up healthy, and on the occasion of such a round date, the nursing mother decided to eat melon. A few hours later, she became nauseous. Lena thought she was poisoned. But soon the doctors clarified the situation: Lena was pregnant again. The first period after childbirth simply did not have time to begin.

How many more such cases! If a woman's periods are irregular or did not have time to come at all, as in the situation with Lena, traditional calculations will not help. It's good that there are alternative methods.

How else to determine the time?

Moms take note!


Hello girls) I didn’t think that the problem of stretch marks would affect me, but I’ll write about it))) But I have nowhere to go, so I’m writing here: How did I get rid of stretch marks after childbirth? I will be very glad if my method helps you too ...

  • based on a gynecological examination;
  • with the help of ultrasound;
  • by the first movement of the fetus;
  • according to the size of the uterus.

In some cases, the doctor "looks after" all the signs in order to make less mistakes in calculating the term.

Gynecological examination

An experienced gynecologist will be able to calculate the correct period only by the size of the uterus. The doctor's hands will accurately determine the boundaries of the uterine cavity. If the uterus is comparable in size to a chicken egg, the period is 4 weeks. And if closer to the goose, then we are talking about eight weeks.

This method works effectively if the gestational age is less than 12 weeks.

ultrasound

Ultrasound scanning today allows you to effectively examine the fetus and even take some measurements. In the first trimester, the doctor will determine the size of the fetal egg and compare them with traditional data. In the second and third, the doctor will already measure the circumference of the chest, tummy or head. The last "measure" is considered the most correct for determining the term.

In the first weeks of pregnancy, calculating the term in this way gives a very accurate result. Later, future babies begin to differ greatly: some are larger, some are smaller. Just like in the life that awaits them in the future.

Baby is pushing!

The first fetal movement is another indicator. If a woman is preparing to give birth to her first child, she will feel his movements at 20 weeks. If the baby is the second, third, and so on, then the first stirring is expected at 18 weeks. This is official medical data. And future kids do not at all consider that they must follow them!

The fetus actually makes its first movements in the first trimester of pregnancy. But the unborn child is still so tiny that the mother does not feel anything for many weeks. But there are exceptions.

Inna was expecting her second child. And so she was thin, and in the first weeks she even lost weight. With a height of 167 cm - 46 kg. And this is in the second trimester! The doctor shook his head disapprovingly and worried. And Inna felt great. Nausea almost did not torment, vomiting was occasionally. True, I constantly wanted oranges, and one red-haired “handsome man” was always in my bag. And there were no problems at all.

The baby pushed at the seventeenth week. First once, and after a couple of hours - again. And the next day, and the day after, the woman experienced the same sensations. At the next appointment with the gynecologist, Inna named the date. The doctor once again shook her head, smiled and clarified - maybe it was gases? Inna laughed - she perfectly remembered the movements of the baby from her first pregnancy and could not be mistaken.

True, sometimes you can still confuse. If the expectant mother regularly suffers from flatulence, and even expects a child for the first time, the movement of gas through the intestines is sometimes taken by her for the movements of the baby.

When weeks equal centimeters

And another way, which is related to the size of the uterus. More precisely, with its height. This method is available only to doctors. The pregnant woman lies down on the couch. The doctor takes a centimeter tape or a special tool - a pelvis meter. Determines the upper and lower boundaries of the uterine cavity and makes measurements.

The height of the uterus in centimeters is the gestational age. That is, if the doctor measures 30 cm, then the gestational age is 30 weeks.

These four methods (usually in combination with each other) give the most accurate determination of the gestational age.

And when will it be born?

The expected date of birth will tell the mother when the baby will be born. But this is a theory. Children very rarely follow the calculations of doctors. True, there are exceptions here.

On ultrasound at 12 weeks, Lika was called PDR - March 10. Lika just shrugged her shoulders. She carried her first baby exactly a week. The doctors then said that the baby probably wants to grow up. Indeed, even a post-term son weighed only 2 kg 700 g at birth.

Therefore, early in the morning on March 10, Lika did not even immediately realize that contractions had begun, and stubbornly tried to sleep a little more. But it didn't work out. It soon became clear - it began. That's how the daughter was born - just right on time.

Negele formula:

Quite accurately, the expectant mother can calculate the EDD herself. Of course, if the periods before conception were regular.

  1. It is necessary to add seven more days to the first day of the last menstruation, and then subtract three months.
  2. Or add 9 months and 7 days to the first day of your last period.

Here is the approximate date of birth of the future crumbs!

You can find out the EDD using a special pregnancy calendar for the last menstruation. In the red line we are looking for the date of the beginning of the last menstruation, next to it, in the yellow line, we see the date of the probable day of delivery.

For example, the last menstruation began on January 28. Plus seven days is February 4th. Minus three months - we get the 4th of November. And how it will actually be - life will show.

The main thing is that at any time the pregnancy should be easy.

Moms take note!


Hello girls! Today I will tell you how I managed to get in shape, lose 20 kilograms, and finally get rid of the terrible complexes of overweight people. I hope the information is useful to you!

When a long-awaited pregnancy comes, a woman often scatters her attention to everything at once, so a clear plan of how and what to do during this period simply disappears. In order for any woman to be able to follow the course of her pregnancy and focus on the signs of the normal development of the child in one week or another, a weekly pregnancy calendar has been created.

Why you need a pregnancy calendar

There are many reasons why it is so important to monitor the pregnancy process.

  • To discover in time deviations from the norm. Of course, every woman wants the fetus to develop well, but if something suddenly goes wrong, you should immediately inform the doctor about it, even if the next consultation is scheduled in two weeks.
  • Pregnancy is the happiest period in the life of every woman, and how mysterious it is! The pregnancy calendar helps the fairer sex to know better what is happening in her body at one time or another, to realize at what stage of formation her baby is currently at.
  • It is this calendar that helps a woman keep calm when, for example, the baby begins to move and push, it only seems that you immediately understand what is happening, but in fact, first of all, there is a kind of panic - suddenly something is wrong. Tracking pregnancy by week is very exciting.
  • In addition to stating facts and explanations of what exactly happens in a woman's body the pregnancy calendar contains many tips and recommendations regarding nutrition, behavior and other nuances in the life of a pregnant woman.
  • Even those women who think they know absolutely everything about pregnancy can find here many interesting facts and surprises that the baby is preparing while sitting in the tummy.

This pregnancy calendar for each week contains important information about:

  • stages of child development;
  • actions to be taken in certain cases;
  • woman's well-being.

You will also find a lot of entertaining material on how to eat better and what is better to do in different weeks of pregnancy. Here are photos of the ultrasound of the fetus and a video about each week, it will be interesting for future mothers. Another important service is the due date calculator. It accurately calculates the date of the upcoming birth and gives the pregnant woman more confidence in herself and in the upcoming event.

When a woman is expecting a child, she has a huge responsibility. This responsibility cannot be shifted either to the shoulders of relatives or to the shoulders of a beloved husband, because it is the woman who experiences all the sensations that need to be guided. Therefore, the representatives of the weaker sex are looking for a pregnancy calendar, as a rule, in order to find out what you need to pay attention to and what to follow during this special period.

Dangers during pregnancy

Everyone knows that during pregnancy there are a number of possible risks that you should definitely pay attention to. Some weeks of pregnancy are especially dangerous. For the entire duration of pregnancy, there are two periods that are called critical.

  • Week 13 - at this time, metamorphoses with hormones occur, special exacerbations are observed in women who have to give birth to a son, because testosterone is produced in the developing body. It is recommended to visit a doctor this week and inform him of the slightest changes or pains.
  • Week 27 - this period is dangerous for that category of expectant mothers who, before this week, were already worried about hormonal disorders. In this case, you need to be under the supervision of a doctor for this time.

Only the two most dangerous weeks have been named, but in fact, other periods also carry a certain danger, you can read more about this in the pregnancy calendar. We also do not forget about how much danger the first weeks of pregnancy hide in themselves - the first trimester, when the fetus is just being formed.

  • During these periods, proper nutrition is not only recommended, it is necessary! Only fortified food, there should not be any hot spices or an excess of salt in it.
  • Outdoor activities and more! Of course, if it’s cold outside, you won’t pamper yourself with long adventures through the streets, but if possible, you need to be in the fresh air as often as possible.
  • We exclude all bad habits, in particular, we are talking about alcohol and smoking, and this is not only for certain weeks, but for the entire period of pregnancy, and even better - for life.
  • Dyes and chemicals should be avoided for obvious reasons.

For each week, our calendar reflects mandatory and detailed analyzes and medical events.

As a rule, a woman needs to have a separate medical card in order to paste all the certificates and test results there.

  • You will also find information in the pregnancy calendar about nutrition during any given period of pregnancy. Each stage has its own recommendations regarding the intake of vitamins, folic acid, calcium and vitamin E.
  • Pregnancy is not a reason to restrict movement. For the normal well-being of a woman and a child, physical activity is necessary. But how to play sports, and at the same time not harm the child and not jeopardize the pregnancy? About the basic rules that a pregnant woman must follow during classes sports, as well as about preferred and unwanted sports, you can find out from the pregnancy calendar.
  • Sex- the topic is piquant, especially during pregnancy. You should not deny yourself the pleasure, but still, there are certain restrictions for each trimester of pregnancy. You can learn more about them in the section of the corresponding week.

Pregnancy is a wonderful time, with all the surprises and annoyances. Give yourself the pleasure of studying this period in detail using the weekly pregnancy calendar.

The long-awaited pregnancy has come, and you really want to know when you will see your baby? To calculate the gestational age and the expected day of birth, it is enough to know only one date: the day the last menstruation began. It is for her that the gestational age will be calculated by the gynecologist when you come to the clinic to be registered.

Calculate gestational age online

Only a few women can accurately name the date of conception of a child in order to accurately calculate the actual gestational age. And even in this case, the birth of a new life may occur on another day, when future parents do not know about it. At the same time, almost every woman remembers the date of the last menstruation, which is why it is her obstetricians who take it as a starting point. Theoretically, ovulation - the period of the release of an egg ready for fertilization - occurs in the middle of the menstrual cycle. Therefore, between the real age of the fetus and the obstetric gestational age (which begins on the first day of the last menstruation), there is a difference of approximately two weeks.

So, in order to calculate the gestational age online, you need to remember when your last period started. Two weeks are added to this day: it is during this period that the egg fully matures - and fertilization can occur. Further, there are two ways to calculate the expected date of birth: the first is when forty weeks are added to the date of the first day of the last menstruation. The second - from the day when conception could occur, three months are taken away and seven days are added to it.

But if you don't like fiddling with calculations, the interactive gestational age calculator will do it for you. Enter your data (the date of the first day of the last menstruation) - and within a second you will receive as a result the gestational age in weeks and days.

Calculate gestational age by date of conception

This calculator can also be used to calculate the gestational age by the day of conception if you are sure that this date is accurate. In this case, you will know the actual (gestational) gestational age, which will correspond to the age of the fetus. The obstetric period that the doctor will give you on the first day of the last menstruation will differ from it by about two weeks (that is, there will be more gestational).

Using our calculator to calculate the gestational age by weeks, you can also find out the approximate due date and start preparing for them in advance: find a comfortable maternity hospital and a good doctor, learn breathing techniques during childbirth, choose a comfortable position for childbirth, think about partner childbirth, arrange nursery and stock up on everything you need to care for a newborn.