Blood renewal calculator for planning the gender of the baby. An ancient theory that has received substantiation in modern science. You can determine who will be born a boy or girl using a technique that came to us from ancient China.

The expectation of a child is always considered a happy event, new sensations and emotions appear in a woman's life. The news of the imminent replenishment causes a lot of different feelings, one of the main experiences for many parents is associated with the sex of the unborn child. Nature is so laid down that it is impossible to immediately find out this information. For this reason, there are many methods, technologies, tables and signs designed to calculate the sex of a child. After all, one of the first questions that friends and acquaintances ask a pregnant woman: "Who are you waiting for - a boy or a girl?"

Online calculator for calculating the sex of the child

Today, there is a popular way of determining - this is an ultrasound scan. But this method shows reliable data only from the second trimester and only on high-quality equipment. The old device sometimes reflects inaccurate information, moreover, the doctor's experience must be taken into account.

You can use folk signs, for example, using a ring over the belly. Sometimes a woman relies only on her feelings, knowing for sure that she will have a daughter or a son. But the signs and your own intuition are not always reliable. It is impossible to rely on them in determining the sex of the baby.

What does our site offer? We can have a baby using a universal calculator for calculating the sex of a child. Why is he so unique? With it, you can calculate the sex of the child and identify the likelihood of having a boy or girl.

The calculator has collected several popular methods, the calculation of gender is based on technologies that are the most famous and already proven among women.

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O (I) Rh− O (I) Rh + A (II) Rh− A (II) Rh + B (III) Rh− B (III) Rh + AB (IV) Rh− AB (IV) Rh +

How to work with a child's gender calculator

For an accurate forecast, you need to enter the month in which conception occurred, enter the dates of birth of the father and mother. And, importantly, the blood group of the parents is entered into the columns of the online calculator.

The result of the forecast is then displayed on the screen. If all methods showed the same information, then the probability of having a boy or girl is 100%. If the results of the methods differ, then the percentage probability of gender is reported. For example, 75% - a boy will be born, or 50% - a little princess may appear in the family.

Important: on our website you can check information about the future field for each specific method individually.

Calculator efficiency

Calculating the sex with the help of a calculator is trusted by people who have matched the calculations, and got one hundred percent hit. Some women got a vague result, but it is worth considering a small statistical error in the calculations.

Whether or not to trust the method, everyone decides for himself. The influence of the genetic factor on the formation of sex cannot be ruled out. So, deviations in the health and set of genetic information of one of the parents can affect the sex of the little man. There are families in which only boys are born, or, conversely, only girls are born to a couple. Surely everyone is familiar with such examples.

It is clear that parents want to know the sex of the baby faster, sometimes women are interested in this issue already at the first ultrasound scan at 12 weeks. But sometimes you should not rush to the discovery, in some cases it is better to focus on pregnancy in order to give birth to a healthy baby. Treat the unborn child with love, an important event in his and his parent's life will soon happen - birth. The calculator of our site predicts the result, treat the calculations like a game and fun during pregnancy.

There are theories according to which the cells of the body, including blood cells, are periodically renewed. According to one of them, this biological fluid in humans changes every seven years, regardless of gender. According to another, more common, it is believed that blood renewal in men occurs every four years. It changes a little more often in women - every three years. This process is cyclical and continues throughout life. Thus, each person, according to their age, can determine when the update was last and when the next will be. According to one theory, the counting should be carried out from the very birth in men and from the first menstruation in women. According to the other, from 15 years old for women, and from 16 years old for men.

How can it be applied in practice?

There is an opinion that the state of human health depends on the age of this biological fluid, that is, the older it is, the more a person is susceptible to stress, infectious and other diseases. At this time, chronic diseases are more often exacerbated and new ones appear. Therefore, many future parents who have such information conclude that in the last year before the blood is renewed, it is better to refuse to conceive a child. It is believed that it is advisable to do this at a more favorable time, namely in the first year after it changes. They say that children who were conceived during this period are endowed with better health, rarely have congenital defects, and are less prone to illness and allergic reactions.

Usually, in practice, the property of blood to be renewed is used in order to find out who will be born - a girl or a boy. You can calculate the sex of the unborn child both after conception and at the stage of pregnancy planning.

How to calculate gender?

If you believe this theory, the couple will have a child of the same sex with the parent whose blood at the time of conception will be younger. If she was younger than a woman, then a girl will be born, if a man, then a boy will be born. To have a child of a certain gender, you need to make simple calculations. To do this, you need to know the year of birth of each of the spouses or the number of full years. Then divide the age of the future father by 4, and the age of the future mother by 3. From the resulting remnants, determine whose blood is younger at the moment.

For example:

  1. The woman is 23 years old, the man is 25 years old.
  2. 23 divided by 3 is 7.6.
  3. 25 divided by 4 is 6.25.

Those who have less remainder are younger. As you can see, the man is younger, so if conception occurs at this time, the couple will have a boy. If the spouses want a girl, they need to calculate when the blood of the future father will be older than that of the future mother. In this case, it will happen in two years:

  • The woman will be 25 and the man 27.
  • 25 divided by 3 is 8.33.
  • 27 divided by 4 is 6.75.

The future father has more balance, so the couple can expect a girl.

There is an easier way to determine the gender of a baby. To do this, you need to use the ready-made data:

  • the age when the blood is renewed in men: 20, 24, 28, 32, 36 and so on;
  • similarly for women: 18, 21, 24, 27, 30, 33 and so on.

Blood renewal can tell you who will be born to you: a boy or a girl.

Based on this information, it is necessary to compare the age of the future mother and father and determine who had the update earlier and who later. So you can find out whose blood is older and whose blood is younger.

For the pair from the example above:

  1. A 23-year-old woman had a renewal two years ago, and a 25-year-old man a year ago, which means that the man's blood is younger, so the couple should have a boy.
  2. The situation will change in two years. The woman will be 25 years old, that is, her update took place a year ago. The man will turn 27 and his blood will be older, since it was renewed three years ago. Therefore, it is most likely that a girl will be born.

The question may arise of what gender the child will be born, if, in the calculations, the man and the woman have the same residuals. They say that in this case, twins may be born.

What should be considered?

Such calculations will be correct if no one in the pair experiences significant blood loss. Otherwise, the update will take place earlier. This can happen:

  • during the donation process;
  • during surgery;
  • as a result of an accident or injury;
  • during childbirth, abortion, miscarriage.


From the moment of pregnancy diagnosis, future parents want to know the sex of the child

In such cases, the last update occurs at the time of one of the above events.

According to most doctors, it is hardly possible to determine the sex of a child in this way. Also, the theory of blood renewal itself is not indisputable, therefore, to believe or not is a private matter for everyone. The method has no scientific basis and cannot guarantee an accurate result, even if many mothers claim that everything came together. This is most likely a common coincidence.

Even if we assume that cell renewal occurs every three to four years, which is in great doubt, it is still unlikely that an undistorted result can be obtained if massive bleeding or transfusions have occurred. According to many scientists, the cell renewal that occurs in the body is a much more complex process, associated not so much with periods of time, but with genetics and various biological processes.

Pregnancy, especially the long-awaited one, is a bright event in the life of every family. And already, only after seeing 2 strips on the test, the couple becomes curious who they will have - a boy or a girl. Most of all, this issue is worried about couples who already have one child or several same-sex children.

It is no secret that determining the sex of the unborn child is possible only at 18-20 weeks of pregnancy during ultrasound examination. And for some it is not easy to wait so long. Here methods come to the rescue (the ancient Chinese table; renewal of the parents' blood; date of conception; fetal heartbeat and others), with the help of which parents can find out the sex of the unborn baby. However, until now, not a single physician considers these methods to be reliable. From the point of view of medicine, this is comparable to fortune telling on coffee grounds. Only medical methods (genetic research, ultrasound) make it possible to most accurately calculate who the couple is waiting for - a boy or a girl.

So, in this article we will look at how to determine who will be born - a boy or a girl.

Genetic research

These include amniocentesis, cordocentesis, and chorionic biopsy. These studies are prescribed solely for medical reasons to detect genetic diseases or fetal malformations. They allow you to determine the sex of the child with 99% probability. Such an intervention can cause a miscarriage or premature birth, because the material (amniotic fluid, chorionic villi, umbilical cord blood) is taken from the uterine cavity for examination

Determine the sex of the fetus by ultrasound

It is possible to determine the sex using ultrasound as early as 16 weeks. But more reliable information can be obtained only at 20-25 weeks of pregnancy. In some cases, the specialist cannot see the sex of the fetus on an ultrasound scan, for example, he is in an uncomfortable perspective or his genitals are closed by the umbilical cord.

Ultrasound is considered to be the most effective and safest way to find out the sex of the fetus. The reliability is 95%.

Gender by date of conception

It is known that conception occurs during ovulation (the release of a mature egg from the follicle into the fallopian tube to meet with the sperm). The gender of the baby is determined at the time of conception. If sexual intercourse took place on the day of ovulation, then sperm carrying male chromosomes will reach the egg faster, which means there will be a boy. If intercourse occurred a few days before ovulation, then the fertilization of the egg will occur with the most hardy sperm carrying the female chromosome (as a rule, sperm with male chromosomes will have already died by this time). Thus, knowing the day of ovulation and the day of conception, you can estimate who will be born.

Determination by parental blood

A popular technique among future parents is to determine the sex of the child by renewing the parents' blood. The reliability of the method is 50% - he either guesses the sex of the fetus or not. Therefore, the method is more suitable for entertainment.

Blood renewal theory

There is an assumption that the blood of the parents influences the sex of the child. Every person has a renewal of blood in the body throughout his life. In women, the blood is renewed once every three years, in men - once every four years. And which of the parents at the time of conception has more "fresh" blood, the baby will be of the same sex. However, early blood renewal is also possible with blood loss of more than 1000 ml, for example, during a surgical operation, previous difficult childbirth, blood donation (donation), abortion. Therefore, these factors are also taken into account in the calculation.

How to calculate gender based on parental blood renewal

The scheme for calculating the sex of the baby is simple. Suppose the future dad is 29 years old, and the mother is 23. Further, simple arithmetic operations are carried out: the age of the woman is divided by 3, and the age of men by 4 (23: 3 = 7.7; 29: 4 = 7.3). As you can see from the example, the father's remainder is 0.3, and the mother's is 0.7, and since it is 3.7, the couple is likely to have a boy.

If, after the calculations, the remainders are the same, then the couple can have both a girl and a boy.

We offer to determine the gender of the baby by updating the blood on an online calculator. It is enough to enter the date of birth of the parents and know the exact time of conception.

If a man or woman has donated blood, surgery, childbirth, then instead of the date of birth, the date of the last blood loss is indicated.

Date of birth of a man:

Woman's date of birth:

Conception date:


(calculation will take a few seconds)

Determine gender by fetal heart rate

This technique is based on the statement that the number of heartbeats in boys and girls is different. Before ultrasound machines, many gynecologists using a stethoscope could find out the gender of the fetus by the heartbeat. Gynecologists noticed that girls 'hearts beat more often - 150 and more beats per minute, and boys' hearts - within 120-140. However, this technique has not been proven, because many factors can affect the heartbeat, for example, excessive fetal activity, possible hypoxia, uterine tone, gestational age, time of day, increased blood pressure in the mother.

According to the Chinese calendar

It is possible to find out the sex of a child according to the ancient Chinese calendar, which is more than 700 years old. The Chinese believe that its accuracy is very high. It was on him that in ancient times they determined who would be born to a couple. The method is based on the relationship between the woman's lunar age at the time of conception and the month in which it occurred.

It is customary for the Chinese to count age not from the date of birth, but from conception. It turns out that Chinese babies are born 9 months old (months of intrauterine life are added). But, if the baby was born in January or February, then it may be necessary to add another year to its age, in addition to 9 months. The fact is that during this period the Chinese have a New Year.

  • If she was born after February 23, then 9 months of intrauterine life is added to her age (rounded up to 1 year).
  • If from January 1 to January 21, then 2 years will have to be added to the age (i.e. 9 months + 1 year).
  • If the date of birth fell on the period from January 21 to February 23, then it is already more difficult to calculate the Chinese age. First you need to find out when this year was New Year in China. If a woman was born before him, then 2 years are added, if after - then 1.

To determine the sex of the unborn child according to the ancient Chinese table, use the online calculator, where you must indicate the month of conception and the lunar age of the woman.

Fertilization, pregnancy and the subsequent birth of offspring are natural functions of the female body. Sooner or later, each of the fair sex finds herself in an "interesting" position. During this period, she is worried about many issues, one of which is the gender of the future newborn. There are many ways to find out who will be born to you in the end. This article will inform you about how the sex of the child is determined by the blood group of the parents. You will find out the features of this method and the main stages of the calculation. It is also worth mentioning what kind of reviews this method has.

How to determine the gender of a child by parental blood groups?

So, you are planning or have already conceived a baby. You are interested in who will be born in the near future. In order to determine the sex of the child by the blood group of the parents, it is necessary to know exactly some data.

First, you should contact any laboratory and find out what kind of accessory you have. Medicine knows four blood groups. Moreover, each of them has a positive or negative Rh. This factor can also affect the conception of a baby of one sex or another.

Next, you will need a table that lists all the required values. At the top, you need to find data suitable for the baby's father. In the side column, you need to find the number corresponding to the female blood group. After that, a line is drawn and the intersection point is calculated. In the indicated cell, you can find the answer to the question of interest and understand by the blood group of the parents.

Blood group 1 in a woman

We identify the gender of the child by the blood group of the parents. Provided that the expectant mother is characterized by the first group, the result will be as follows:

  • female - if a man has the first or third group;
  • male - if the father has a second or fourth group.

Blood group 2 in a woman

In this case, the representative of the weaker sex will have a baby of the following sex:

  • male (if the future father has the third and first groups);
  • female (if the father has a second or fourth group).

Blood group 3 in a woman

In this case, the fairer sex is more likely to give birth to a boy. We determine the sex of the child by the blood group of the parents. The result will be as follows:

  • girl - if the father has blood group 1;
  • boy - if the father has a second, fourth, or third group.

Blood group 4 in a woman

Such ladies have more opportunities to give birth to an heir. You can determine the sex of the child by the blood group of the parents as follows:

  • boy - if the father has the first, third or fourth group;
  • girl - if the man has the second group.

Is the Rh factor important?

In addition to the influence of blood groups on the sex of the newborn baby, the rhesus of the parents plays a decisive role. If a woman and a man have the same data, then it is more likely that a daughter will be born. When the Rh factors are different, one can hope for the birth of a son.

Gender of the child by blood group of parents: reviews

What do the parents of the already born babies say? Did their calculations and results match? On this issue, there was a separation of couples. Half of the parents say that all calculations and results are correct. Others argue that everything happened completely differently. The tables promised them a girl, but a boy was born, and vice versa.

You can check the effectiveness of this method already in the second half of pregnancy. Visit the next ultrasound examination and determine the reliability of this method.

What do doctors say about this?

Doctors say that the sex of the child is not determined by the blood groups of the parents. All these calculations are nothing more than simple and harmless entertainment. According to the tables, one married couple should have same-sex children. They are either boys or girls. Then how can one explain the fact that brothers and sisters are born in the same family?

Also, some pregnancies are multiple. Most often, the gender of the future children is different. Based on this method, we can conclude that this simply cannot be.

Also, doctors say that absolutely all fictional methods for diagnosing a person's sex do not have any substantiated evidence. All this is created for entertainment and satisfaction of their own curiosity. There are certainly cases where overlaps occur. However, all this is explained only by the fact that there are only two options for the outcome: the birth of a boy or a girl.

A little conclusion

So, you now know how you can determine the sex of the child by the blood groups of the parents. Remember that this requires accurate laboratory tests. In some cases, an error may occur here. You should not place high hopes on this method, since it is not always an effective calculation method. There are also similar methods that allow you to find out whether a boy or a girl will be born, by the time the parents' blood is renewed. It is better to wait until the due date and find out more precisely who will be born to you during the ultrasound examination.

If you are in doubt, you can ask your obstetrician or gynecologist about this method. Surely the doctor will dispel all doubts on this score and convince you that all calculations are nothing more than fiction. Otherwise, everyone would use this method and give birth to only same-sex children from one spouse. Good luck and getting the expected results!

Useful Tips

For centuries, future parents had to wait for the birth of their child in order to find out his gender.

Now there are different methods for determining the sex of the child ranging from folk signs and ancient Chinese tables to modern medical procedures.


1. How to find out the gender of the child using the table?

According to legend chinese gender table baby was found in an ancient royal tomb in China. She predicts the sex of the baby based on the Chinese lunar calendar.

In this case, you need to know mother's age at conception and month of conception to determine whether you will have a girl or a boy.

There is no scientific evidence that this method works, but you can test it with your friends and family.


2. Gender of the child by date of conception

According to this method, the sex of the unborn child is determined by date when conception occurred and depends on the type of sperm.

It is believed that the Y sperm, which will lead to the birth of a boy, are faster and less hardy than the X chromosome sperm, which are slower but more resistant.


Thus, if conception has occurred 2-3 days before a woman's ovulation, then you have a better chance of giving birth to a girl... If conception took place directly on the day of ovulation or shortly before it, then the likelihood of a boy is higher.

The day of ovulation can be determined by measuring basal temperature or using home ovulation tests.

3. Calculate the sex of the child by blood


According to this theory, the sex of the unborn child can be found out based on renewal of parents' blood... It is believed that in women, the blood is renewed every 3 years, and in men - every 4 years. The sex of the child is determined by which parent has "fresh" blood.

For example, a woman is 26 years old and a man is 28 years old. If 26 divided by 3 we get 8.6, and 28 divided by 4 we get 8. Since the remnant of a woman (8.6) is greater than that of a man, there is a greater probability of having a boy.

It is also worth remembering that in case of blood donation and transfusion, operations, childbirth and other blood loss, it is worth taking the date of the last blood loss.


Gender of the child by blood group

Another entertaining theory of determining the sex of the unborn child is based on blood group and Rh factor of parents... The intersection of the mother's and father's blood types, as well as the Rh factors, indicates whether you will have a boy or a girl.



4. Gender of the child by signs

There are many signs of determining the sex of a child, which were used by our grandmothers and mothers. Of course, these methods are not considered reliable as they have not been validated. Some of them seem to be true because they are approximately 50 percent accurate, and there are some that have been partially scientifically substantiated.

Gender of the baby by the belly


If you carry your child low - you have a boy, if high - you have a girl... There is also an opinion that if the expectant mother the shape of the abdomen is pointed - there will be a boy, and more rounded - a girl.

However, according to experts, the shape of the abdomen is determined by the muscles, uterine tone and position of the child, and not the gender of the baby.

According to the latest data, breast volume is the best indicator of the sex of the unborn child... In women carrying girls, breasts become larger during pregnancy (by an average of 8 cm) than in women carrying boys (by an average of 6.3 cm). This is because boys produce more testosterone and require more energy from the mother, which inhibits breast growth more.

Baby gender by heartbeat


According to the signs, if you have a girl, the fetal heart rate will be higher than 140 per minute, and if the boy is less than 140. In fact, the fetal heart rate changes with growth and development, as well as with the increase in the child's activity. However, it has been scientifically proven that girls' heart rate increases more during childbirth than boys.

Folk signs of determining the sex of a child


The couple will have girl if:

Mother's appearance deteriorated, acne appeared

Daddy started gaining weight

Mom is drawn to sweets

The mother-to-be suffers from severe morning sickness

Parents are over 40 years old

If you hang the wedding ring over your belly, it moves back and forth.

The couple will have boy if:

Mother's appearance has improved

Dry hands appear, feet are cold

Drawn for salty and sour

Mother is stressed

Appetite, calorie intake increased significantly

If you hang your wedding ring over your belly, it moves in a circle.

5. Gender of the child by ultrasound


One of the most accurate methods for determining the sex of a baby during pregnancy is an ultrasound or ultrasound scan, during which high-frequency sound waves create an image of your baby inside the uterus.

Ultrasound is performed not to determine the sex of the child, but to find out if the child is developing correctly.

Depending on the gestational age and the position of the fetus, the doctor can tell you for sure whether you are carrying a boy or a girl.

How long can you determine the sex of the child?


Ultrasound of a boy


Ultrasound girls

Most often, the method for determining the sex of a child by ultrasound is the most accurate. from 18 to 26 weeks of pregnancy... Although new ultrasound technologies can determine the sex of the child at an earlier period of 12-13 weeks.

Until 18 weeks of intrauterine development, the male and female genitals are more similar and therefore the likelihood of error is high. Later dates also complicate this task due to the closer position of the fetus.

It is worth remembering that if the child is in an uncomfortable position for examination or crosses his legs, this can hide the genital area from observation.

Gender of the child: is the ultrasound wrong?


Ultrasound is not a 100 percent method, and the probability of error depends on several factors:

Pregnancy period (the higher, the more accurate)

Equipment (3D ultrasound is usually more accurate)

The professionalism of the doctor conducting the ultrasound

Mother's weights (the fatter the mother, the lower the image quality)

Fetal position

Exists more accurate methods for determining the sex of the unborn child (almost 100 percent), but they are carried out on an ad hoc basis and are accompanied by a great risk for pregnancy. it amniocentesis(puncture of the fetal bladder) and chorionic villus sampling... They are carried out at an earlier date: in the first and beginning of the second trimester.

Amniocentesis is performed between 15-18 weeks pregnancy. The doctor inserts a long needle to take a sample of the amniotic fluid from the fetal bladder, which contains the baby's cells. Typically, this test is prescribed if there is an increased risk of abnormalities in the child and disorders related to the sex of the child.

Chorionic villus sampling is performed between 11 and 14 weeks, and this method is also used only if the child may develop disorders.