1. Enter the initial data in the calculator form: your date of birth and the month and year of the planned conception of the child. If you know the approximate date of your conception (or know information about prematurity / postmaturity), then indicate this.
2. Enter the month and year of the planned conception of the child. Click Calculate.
3. Get data about your type and the predicted sex of the child using the Budyansky method.

Planning the sex of the child according to the Budyansky method

Budyansky - husband and wife - for a long time worked as teachers. It is not known whether it is true or just a “legend”, but during the time they taught at school, they noticed a pattern between the years / months of students and their mothers. Based on their observations, they developed their own theory about the dependence of the sex of the child on the date of birth of the mother. The method has become quite popular and, according to reviews, has a fairly high percentage of “hits”. Statistics for the formulation of the method were collected for about 30 years. The results were so convincing that the work was approved by Rospatent.

The main provisions of the method

The main idea of ​​the method: the sex of the unborn child does not depend on the man, but depends only on the woman's body and the regularity of her menstrual cycle.

How to determine the sex of an unborn child using the Budyansky method without a calculator

A woman needs to determine her "type": even or odd. The type is determined by the year and month in which she was conceived. The data is taken from a two-year menstrual calendar (in the Budyansky menstrual calendar, the year is divided into 13 months lasting an average of 28 days, you can see it below).

If the cycle type is even, then a woman is more likely to conceive a girl on all even menstrual cycles, and a boy on all odd menstrual cycles.

If a woman is born in an odd cycle, then vice versa: in odd cycles she can become pregnant with a girl, and in even cycles with a boy.

Interesting: at the end of the 20th century, American scientists discovered the ability of the egg to secrete special pheromones that literally “beckon” spermatozoa carrying the X or Y chromosome to themselves. Perhaps the Budyansky method is indirectly related to this fact.

What is a biennial menstrual cycle calendar and how to use it

The Budyansky calendar is a table with three columns. In the middle - the dates of the beginning and end of the menstrual months. And on the sides - even (on the right) and odd (on the left) years.

To determine your type, find the menstrual month in which you conceived (to do this, subtract 9 months from your date of birth).

If you were conceived in an even year, then look in the table at the intersection of the month of conception with the right column, if in an odd year, then with the left. At the intersection of the month row and the year column will be your "menstrual type".

odd year	Menstrual months	Even year
type of		type of
odd	January 1 - January 28	honest
honest	January 29 - February 25	odd
odd	February 26 - March 25	honest
honest	March 26 - April 22	odd
odd	April 23 - May 20	honest
honest	May 21 - June 17	odd
odd	June 18 - July 15	honest
honest	July 16 - August 12	odd
odd	August 13 - September 9	honest
honest	September 10 - October 7	odd
odd	October 8 - November 4	honest
honest	November 5 - December 2	odd
odd	December 3 - December 31	honest

If you have an “even” type, then with an “even” type of child, a girl will be born, with an odd type, a boy.

If you have an “odd” type, then with an “even” type of child, a boy will be born, and with an odd type, a girl.

An example of calculating the floor according to the Budyansky method

If you decide to do all the calculations yourself, without using a calculator, this is easy to do. Let's analyze the calculation on a specific example.

Let's say a woman's birthday 24.05.1990 .

If there is no evidence that the girl was overdue or premature, then 9 months are subtracted from the date of birth. We get the approximate date of conception 24.08.1989 . The year of conception is odd, so we look at the 1st column in the table. We look at the intersection of the first column with the row of the month "August 13 - September 9". So, the menstrual type of mom is - odd.

Suppose a woman is planning a pregnancy, and the date of the next ovulation falls on the second menstrual month (January 29 - February 25) 2017. Then we look in the drain with this month and a column with an odd year. We see "odd". So, according to the Budyansky method, at this time will be conceived boy.

Reliability of the method: your feedback

The description of the method is taken from open sources. And a lot about him positive feedback. It is interesting to collect statistics on “coincidences” among site visitors. If you know the results of the ultrasound or have checked data for other children, please vote below.

Why are errors possible when calculating gender? Due to the following factors:

• The birth of the mother “out of time” (if calculations are made on the basis of the birthday, but postmaturity or prematurity is not taken into account).
• Irregular menstrual cycle.
• Conception or birth "at the junction" of the menstrual months.

Various online resources offer expectant mothers a variety of pregnancy planning methods. In particular, a method that allows you to find out the sex of a child by the date of birth of the parents is popular. According to the authors, it is advisable to make the calculation both in preparation for pregnancy and after the onset of conception.

The obvious advantage of the technique is its simplicity. However, the accuracy of her prediction is questionable. How to find out the gender of the child by the date of birth of the father and mother, whether to believe this calculation and how to find out the gender of the baby completely, we will consider further.

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Classmates

Since time immemorial, mankind has sought to look into the future with the help of numerology. The followers of this discipline believe that human life is closely connected with the magic of numbers. However, numerology refers to esoteric teachings, which means it has no basis scientific justification.

If in the distant past such calculations were perhaps the only way to plan pregnancy, then on present stage they were replaced by ultrasound. With its use, you can already get an exact answer about who will be born.

Young moms and dads tend to stay ahead of the curve by turning to articles on how to find out the sex of a child by the date of birth of the father and mother. The technique originated in China many centuries ago. In this country, numerology was one of the most revered teachings.

You can calculate the sex of the child by the date of birth of the parents using the following algorithm:

1. Prepare everything you need. To fix the initial data, you need to prepare a place for writing and stationery in a contrasting color. For clarity, it is convenient to use blue and pink shades.
2. Build a graph. Before you find out the sex of the child by the age of the parents, it is necessary to draw a diagram based on a straight line. It should be divided into equal segments corresponding to calendar months by name and number
3. Set starting points. The month of birth of the mother is marked with one color (pink), and the father with another (blue). You can also use one color, but the result will not be so clear.
4. Get a result. A simple calculation will allow you to find out the sex of the child by the date of birth of the parents. It is necessary to put points through 3, 6 and 9 segments after the birth of the mother. Also mark the points after 4 and 6 segments after the month of appearance on the father's account.

The graph can be continued by increasing the time coverage. The months located between the pink and blue dots (from left to right), according to the creators of the method, are favorable for the conception of a girl. Periods ranging from blue to pink point increase the possibility of having a male baby. When located between points of the same color, the sex of the child cannot be calculated by the age of the mother and father.

Many sites, with information on how to find out the sex of a child by the age of the parents (calculator by date of appearance), offer automatic calculation. It is necessary to enter the dates of the appearance of the parents in the boxes and the system will independently perform all the calculations.

How to determine by the date of conception ()?

There is such a popular theory as the calculation of pregnancy by renewing the blood of the parents. It is based on the assertion that the fair sex has undergone a complete renewal over the years. The process for fathers takes one year longer. It is the one of the spouses who, at the time of fertilization, had more “fresh” blood, allegedly, influences who will appear in the family.

You can find out the sex of the child by the date of conception and the age of the parents by an elementary mathematical calculation:

1. Write down on a separate sheet the year of birth of both spouses.
2. Calculate the period for a woman. To do this, add three to the year of her birth.
3. Calculate with your father. To do this, they resort to a calculation similar to that of women, but the number 4 is added.

Let's take an example of how to determine the sex of a child by the date of conception and the age of the parents. As initial data, we take 1992 for the year of birth of the mother, 1989 for the father. We add 3 years to 1992, getting the years of “young” blood for the girl: 2016, 2019, etc. For the father, plus 4, as a result, 2017, 2021 and etc.

Table 1. Combinations of chromosomes that determine gender

From this it follows that, to determine the sex according to the table, the age of the mother and father, according to lunar cycles and, not related to the biological mechanism, is simply impossible.

The only factor that has a real influence is the combination of chromosomes. The birth of a boy or a girl directly depends on which chromosome, X or Y, was contained in the male reproductive cell - the spermatozoon.

Is the method of determining by the month of birth of the parents one hundred percent?

On the this moment the only way to plan exactly a boy or a girl is in vitro fertilization. This technology allows you to connect two gametes in a test tube.

After the fusion of the sperm and egg, the resulting zygote is placed in an incubator for 3-5 days, and then placed in the uterus. As part of the procedure, it is possible to select spermatozoa that contain only Y chromosomes. Of course, this technology has nothing to do with how to determine who exactly will be born by the age of the parents.

If pregnancy has already occurred, then you have to be patient. The reproductive system of the embryo begins to form around the fifth week. After the eighth, the process becomes active, and by the eleventh, the development of the genitals will begin. They can be differentiated around the fourteenth week, which is silent on the "one hundred percent" table of conception of the sex of the child by the age of the mother and father. used to determine. It is completely safe for the health of the mother and the developing fetus.

To find out the sex of the child according to the table by date of birth is an understandable desire. The technique may well be used as an entertainment. It is not worth relying on its results, drawing any conclusions or making plans for the future.

Of course, there are people who received a reliable result using the method of how to find out the sex by the date of birth of the parents. However, this is quite understandable. The coincidence is explained by the theory of probability. Finding out the sex of the child according to the table and the age of the mother and father is the same as getting the result when fortune-telling on coffee grounds or by tossing a coin. Sooner or later, he really will match. Trying to find out the sex of the child from the table of the age of the parents is a waste of time.

Useful video

If you want a child of a certain gender, then a schedule specially drawn up for the parents' birthdays will help to calculate the sex of the child when planning a pregnancy (planning a child):

Conclusion

1. Recommendations on how to find out the gender of a child by the year of birth of the parents, the table and the calculation method have no scientific justification and are supported only by superstition.
2. You should not believe everyone who imposes information on how to find out the sex of a child by the date of birth of the parents or. Such proposals are either quackery or incompetence.
3. It is better to be patient and who will surely tell who will appear in a happy family.

In contact with

Future parents from the first days after conception want to determine the sex of their child. There are many methods for this, but none of them gives a 100% result. The only accurate method for today how to determine the sex of a child is an amniopuncture or chorion biopsy. This is a rather complicated procedure for taking amniotic fluid and it is prescribed only to detect genetic abnormalities, if there are indications for that, as it can provoke a miscarriage.

It is worth noting that the sex of the unborn baby is affected by the sperm that fertilized the egg. If he carried the X chromosome, then a girl will appear, and if Y - a boy.

Ultrasound to determine the sex of the child

The closest to the truth is the determination of the sex of the baby, and most importantly, it is accessible to everyone - through an ultrasound examination of the fetus. It, as a rule, is prescribed not only to find out the sex of the child, but to monitor the development of pregnancy and only on time, in accordance with international standards. So, the first ultrasound for a future mother is recommended to be done at 12-13 weeks to identify early term gross anomalies in the development of the fetus. The next study is after 20 weeks. At the same time, the organs of the crumbs, which are already well visualized, are studied. The last ultrasound is performed when the pregnancy is full-term, and thus the volume of amniotic fluid, the weight of the baby, and the maturity of the placenta are determined.

During an ultrasound examination, the accuracy of determining the sex of a child depends on the gestational age, as well as the experience of the doctor conducting it. Until 8 weeks, the baby's genitals are not differentiated. Their formation in the fetus continues until about 12 weeks. But doctors agree that future parents can find out the sex of the child no earlier than 12 weeks of pregnancy. In boys, the scrotum and penis are visualized on ultrasound, in girls, the labia majora.

During the study, the doctor may mistakenly determine the sex of the child: instead of the boy's penis, an umbilical cord loop or a finger is noticed, and the swelling of the girl's labia, passing over time, is very similar to the scrotum. It also happens when a boy hides his genitals behind his clenched legs, and parents are told that they will have a girl.

It is best to find out the sex of the baby on an ultrasound scan at 23-25 ​​weeks. During this period of pregnancy, the fetus is quite mobile, and most likely, the doctor will be able to consider its sexual characteristics. In the later stages, this can be difficult due to its small mobility and considerable size.

Many people wonder how then to accurately determine the sex of the child, even if ultrasound can be wrong. As mentioned above, there is only one such method - chorion biopsy. It is carried out at an early stage (7-10 weeks of pregnancy) and consists in drawing a small amount of amniotic fluid with a thin needle to detect chromosomal abnormalities.

The indications for this procedure are:

1. hereditary diseases associated with the X chromosome;
2. identification of certain genetic conditions, the establishment of twins.

This method of determining the sex of a child is not used without medical indications, but gives almost 100% result and allows you to calculate the sex of the child.

Sex determination by blood type

To use this method to calculate the sex of the unborn child, you need to know the blood type of each parent and match them. There may be the following variations:

• A woman is a carrier of the first blood group, and a man is a second or fourth. In this case, a boy should appear. If the mother has the first blood type - the father has the third or both have the first, then a girl should be born.
• A woman with the second blood group, and the father - the first or third. This means that the parents are waiting for an heir. If the mother has the second, the father has the fourth or also the second, the appearance of a girl is expected.
• Parents need to wait for the girl and with the third blood group in the mother, and in the father - the first. If the mother is a carrier of the third blood type, and the man has the first, third or fourth, then they need to expect a boy.
• With the fourth blood group in a woman and the second in the future father, we can talk about the birth of a girl. If the mother is a carrier of the fourth group, and the father is the first, third or fourth, then they are expecting a boy.

Opponents of this method of determining the sex of a baby speak of its implausibility, since in this case only same-sex children would be born to the same parents. But in many families there are children of different sexes.

Also using this method to find out the sex of the child, it should be borne in mind that the sex of the baby also depends on the Rh factors of the blood. expectant mother and father. The birth of a boy is predicted with opposite Rh factors of future mothers and fathers. The girl will be born with the same Rh factors in her parents.

Determining the sex of a child by blood type is quite popular, but does not carry any scientific basis. Many question it, but for a change, you can try and use it to calculate the sex of the child.

Chinese table for determining the sex of a child

Parents in China have long used this method, as the Beijing Institute of Science says it can determine the sex of a child with 98% accuracy. To calculate the sex of the child in accordance with the Chinese table, you must specify the age of the expectant mother and the month in which the baby is expected to appear.

This method is also suitable for those who only want to plan the gender of the child. In this case, the table must indicate the age of the woman and the month of conception. Next, you can see the result of the intersection of these data. This will help determine the sex of the child in advance, and correctly approach the date of the intended conception.

It is worth noting that this table is over 700 years old, and its original is still kept in Beijing.

Determination of the sex of the child by ovulation

Many people know about this method of determining who will be born. It is scientifically established that closer to ovulation, the environment in the vagina becomes more alkaline, and therefore it is susceptible to X-chromosome spermatozoa carrying a girl. This is due to the fact that they are slower and more stable, unlike the Y chromosomes.

Therefore, if the egg is fertilized during ovulation, then a boy is more likely to be born. If this happened a few days before ovulation, then most likely the future parents will expect a girl.

The moment of ovulation is determined by measurement. So, under the influence of progesterone, the temperature during ovulation rises by 0.4-0.6 degrees. There are also ways to help identify it. This is another way to plan the gender of the unborn child.

Useful information on determining the sex of the child

In addition to the basic methods that help to find out the gender of the child, the following important points can be noted:

• Spermatozoa, which are carriers of the male chromosome, unlike female ones, react poorly to negative external manifestations. For this reason, men who work in hazardous industries rarely give birth to boys.
• An important role is played by the hereditary factor. If a mother is from a large family with more than 4 children, then there is a high probability of a birth and she has a predominant sex among sisters or brothers.
• Also, the sex of the child depends on the chromosome that fertilizes the cell. Sometimes the female body refuses to accept the male cell. When trying to get pregnant, some women notice that there was a delay, but the pregnancy never occurred. The reason for this may be that the female body rejected the egg fertilized by the male sperm.
• Women and men with a strong-willed character are more likely to have a boy. And calm parents with a gentle character, as a rule, become the parents of girls.
• Girls are born more often in a family of smokers, as well as in men suffering from gout and some other diseases.
• British scientists have published a study that indicates that in families where the man is older than the woman, as a rule, the first boy is born. If, on the contrary, the expectant mother is older than the man, then it is likely that their first child will be a girl. This rule applies only to determining the sex of firstborns.
• There is an opinion that the heart rate of the fetus over 140 times per minute indicates the birth of a girl, in boys the heartbeat is more rare.
• Scientists have also found that with prolonged male abstinence before conception, more viable female spermatozoa with the X chromosome remain in the semen. Males with a Y chromosome become weakened and will not be able to fertilize an egg. Therefore, after male abstinence, a girl is more likely to appear.

Folk ways to determine the sex of a child

Since ancient times there has been a large number of folk signs helping to determine the sex of the child during pregnancy. Here are the most popular ones:

1. If a waist line is drawn from the back of a pregnant woman, then she is expecting a boy.
2. Boys also push hard in the stomach.
3. If the appearance of the expectant mother has deteriorated due to poor skin condition in interesting position then she is pregnant with a girl.
4. The preference for salty foods, as well as cold feet, indicate the expectation of a boy.
5. Women who are waiting for an heir become clumsy, and the future mothers of girls are graceful.
6. Swelling in the legs is a sign of the appearance of a boy.
7. Active sex life before conception increases the chance of having a girl.
8. Increased hair growth on the legs indicates the expectation of a boy.
9. Thin and tall representatives of the fair sex most often give birth to girls, and short ones with a dense physique give birth to boys.
10. Young mothers under the age of 25 most often become parents of boys.
11. Early toxicosis is characteristic of a girl's pregnancy.
12. A low position of the abdomen is a sign of expectation of a boy.

Video on how to determine the sex of the baby:

About who “lives” in the stomach, a boy or a girl, the date of the last menstruation can tell. Today, the method of calculating the sex of a baby by menstruation is quite popular.

Determination of the sex of the child by the date of the last menstruation

How to determine the sex of the child using the date of the last menstruation? To do this, girls need to know the two main days on which menstruation began and ended.

To help expectant mothers - a table with the help of which, in the event of pregnancy, they will determine the sex of the child by the last menstruation. This calendar allows you to make convenient calculations in the future, already during pregnancy.

How to find out the sex of the child by the date of the last menstruation?

Method 1.

For calculations, you need to know the days when menstruation began and ended. This will allow you to easily determine the month in which the baby was conceived. By the way, the obstetrician-gynecologist, to whom the expectant mother will go to register, will also require such data.

To calculate the sex of the child by the date of the last menstruation, you need to make simple calculations. Let's imagine that the baby was conceived in October, that is, in the 10th month (we understood this by the date of the last menstruation), and the age of the expectant mother is 24 years. Further, according to the formula, we should add the obtained values ​​\u200b\u200band add one to them. If you get an even number - wait for a girl, if an odd number - a boy. That is, in our case it turns out: 10+24=34+1=35. Since the number is odd, a boy will be born.

Method 2.

If you do not know how to calculate the sex of the unborn child by menstruation, use very real scientific data. Every girl knows what ovulation is. If you keep your own calendar of the monthly cycle, you can calculate the sex of the child with a high degree of probability.

To do this, it is necessary to draw up a cycle table for several months and measure the basal temperature every day. Data should be plotted.

After you collect all the information, it will be possible to determine the exact period of ovulation. It falls on the peak values ​​​​of basal temperature, which rises to 37 degrees approximately in the middle of the cycle, and then decreases.

Next, we proceed directly to determining the sex of the child. The most suitable days for conception are the days of ovulation: it is at this time that the egg fully matures. Spermatozoa, which contain female chromosomes, are highly survivable and can fertilize an egg within 5-6 days. spermatozoa with male chromosomes less tenacious, but more mobile. They die within 1-2 days.

For those who want to conceive a girl, the optimal period for having sex is 5-6 days before ovulation. Parents who dream of an heir should conceive either the day before ovulation, or during it.

By the way, determining the sex of a child by the date of the last menstruation can be carried out using the online ovulation table, which is available on various Internet resources. If you do not want to keep a paper calendar, you can use this table.

Thus, it is quite realistic to calculate the sex of the baby by the date of the last menstruation, although this method will not give you a 100% result. But, judging by the reviews of many girls, the probability of this method is quite high, so you can safely use it. Believe it or not the results - it's up to you. In any case, the most important thing is that the child develops and grows well, and whether he will be a boy or a girl is not so important.

Helpful Hints

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

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

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

According to the legend chinese sex determination table baby was found in an ancient royal tomb in China. She predicts the gender 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 confirmation that this method works, but you can test it on your friends and relatives.

2. Gender of the child by date of conception

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

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

Thus, if conception occurred 2-3 days before a woman ovulates, then you are more likely to give birth to a girl. If conception took place directly on the day of ovulation or shortly before it, then a boy is more likely to appear.

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

3. Calculate the sex of the child by blood

According to this theory, the sex of an unborn child can be determined based on renewal of the blood of parents. It is believed that in women the blood is renewed every 3 years, and in men - once every 4 years. The gender of a 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 remainder of the woman (8.6) is greater than that of the man, then the probability of having a boy is more likely.

It is also worth remembering that in the 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 an unborn child is based on blood type and Rh factor of parents. The intersection of the blood type of the mother and father, as well as the Rh factors, indicates whether you will have a boy or a girl.

4. Gender of the child according to signs

There are many ways to determine the sex of a child, which our grandmothers and mothers also resorted to. Of course, these methods are not considered reliable, as they have not been validated. Some of them seem to be true because they are about 50 percent accurate, and there are others that have been partly scientifically proven.

Gender of baby by belly

If you carry the 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 by 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 bearing girls, the breasts become larger during pregnancy (by an average of 8 cm) than in women bearing 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.

Gender of baby by heartbeat

According to the signs, if you have a girl, then the fetal heart rate will be higher than 140 per minute, and if a boy, then less than 140. In fact, the fetal heartbeat changes as it grows and develops, as well as during an increase in the activity of the child. However, it has been scientifically proven that the heart rate of girls rises more during childbirth than that of boys.

Folk signs for determining the sex of a child

© blanaru/Getty Images

The couple will have girl if:

Mother's appearance deteriorated, acne appeared

Dad started gaining weight

Mom is craving sweets

Expectant mother suffers from severe morning sickness

Parents are over 40 years old

If you hang a wedding ring over your stomach, it moves back and forth

The couple will have boy if:

Mother's appearance improved

Dry hands, cold feet

Draws on salty and sour

mother is stressed

Significantly increased appetite, calorie intake

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

5. Gender of the child by ultrasound

One of the most accurate methods of determining the sex of a baby during pregnancy is an ultrasound or ultrasound, 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 in order to find out whether the child is developing correctly.

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

At what time can you determine the sex of the child?

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

Up to 18 weeks of fetal development, male and female genital organs are more similar and therefore the probability of error is high. More late dates also complicate this task due to the closer position of the fetus.

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

Gender of the child: is the ultrasound wrong?

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

Pregnancy age (the higher, the more accurate)

Equipment (3D ultrasound is usually more accurate)

The professionalism of the doctor conducting the ultrasound

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

Fetal positions

Exist more accurate methods for determining the sex of the unborn child (almost 100 percent), but they are carried out as needed and are accompanied by a high risk for pregnancy. it amniocentesis(puncture of the fetal bladder) and chorionic villus biopsy. They are carried out at an earlier date: in the first and the 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 amniotic sac, which contains the baby's cells. As a rule, this test is ordered if there is an increased risk of abnormalities in the child and disorders related to the sex of the child.

Chorionic villus biopsy is performed between 11 and 14 weeks, and this method is also used only if it is possible for the child to develop disorders.