How is the child's blood type calculated if there is data on the group and Rh of the parents. Baby Gender Calculator

Quite popular is calendar (table), allowing determine gender germ by combination blood groups both parents. This conception calendar (table) are used not only by those who are already waiting for the appearance child into the world, but also those who only plans the arrival of a new person in the family. As you know, every person at birth receives certain blood group, which does not change throughout his life.
These blood groups there are four, each of them has two subspecies, depending on Rh factor(it can be positive or negative). There is a theory that determine the sex of the planned child by blood group his biological parents. According to her, the combination of certain blood types significantly increases the likelihood of this couple having boys or girls.
The theory states that if both partners have blood type 1 or 2, then they are likely to have girl, but if both partners have 3 or 4 groups, then they should expect boy.

How to determine the sex of a child using a calendar (table) by the blood group of the parents?

A woman with the 1st blood group, with big share probability will give birth to a girl from a partner with the 3rd group and a boy from partners with the 2nd or 4th.
A woman with the 2nd blood group can give birth to a son from men with the 1st or 3rd group, but if the partner has the 4th group, then this couple will have a girl.
A woman who has the 3rd group can have a girl from a partner who has the blood of the 1st group, but if her man has the 2nd or 4th group, then she should expect a son.
Men with the 1st or 3rd blood group, in order to acquire an heir, should create an alliance with a woman who will have the 4th group. A woman with type 4 blood and a partner with type 2 are more likely to conceive a girl.
Of course, the reliability of this method cannot be considered 100%, because the same couple quite often gives birth to children of different sexes.
Table for determining the sex of the child by the blood type of the parents | Conception calendar

Next table for calculation gender of the child on parent's Rh factor.

Rh factors in the blood play a role

However, at the stage child planning must be taken into account Rh factors blood both future parents. If a woman’s blood has a “+” Rh factor, then even if her partner is negative, there are no additional reasons for concern. But if the expectant mother has blood with “-”, and the man has “+”, then during pregnancy a conflict may develop between the blood maternal organism and embryo. To prevent this situation, a woman should contact the doctors, get a referral to the laboratory and conduct a blood test for the formation of Rh-factor antibodies in it.
The greatest risk of rhesus conflict occurs in women who have recently been exposed to surgical operations had an abortion, had a blood transfusion. Also, antibodies can form if a woman was already pregnant, regardless of how this pregnancy ended.
You should be aware that if a woman with a negative blood Rh factor has a fetus with a “plus”, then pregnancy can be complicated by various immune diseases such as hemolytic disease of the newborn. Especially often such complications occur during the second or third pregnancy. To prevent the occurrence of complications, doctors regularly send such pregnant women for blood tests for antibodies and recommend that they take anti-Rhesus gamma globulin.

Blood type - a unique set of properties of red blood cells, characteristic of a particular population of people. The generally accepted classification was proposed back in 1900 by the Austrian scientist K. Landsteiner. He received the Nobel Prize for this.

What blood groups exist and how do they differ?

There are 4 groups. They differ from each other in the presence of genes A and B or their absence in the composition of erythrocytes, leukocytes, platelets and blood plasma. The type of blood can be determined using special analysis or home rapid test, which is sold at the nearest pharmacy.

In world practice, a unified classification and designation of blood groups AB0 has been adopted:

1. First (0). People belonging to this category do not have antigens. They act as universal donors because their blood suits everyone. However, only the same blood as theirs can suit them.
2. Second (A). Erythrocytes contain one type of gene - A. This type it is permissible to transfuse blood only to the first two.
3. Third (B). It is characterized by the presence of the B gene. A person with such blood is able to become a donor for the І and ІІІ species.
4. Fourth (AB). People who have both antigens in their blood fall into this category. They can act as donors exclusively for their species, and absolutely any blood is suitable for them.

What is the Rh factor, how does it happen?

This article talks about typical ways to solve your questions, but each case is unique! If you want to know from me how to solve exactly your problem - ask your question. It's fast and free!

In parallel with the blood type, the Rh factor is determined. It indicates a protein in the composition of red blood cells. This indicator is:

• positive - protein is present;
• negative - no protein.

Rhesus does not change throughout life and does not have any effect on human health or predisposition to any diseases. It is taken into account only in two options:

1. Blood transfusion. It is strictly forbidden to mix blood with different Rhesus. This can cause the destruction of blood cells (hemolysis), often resulting in death.
2. Pregnancy and preparation for it. The expectant mother needs to make sure that there is no Rhesus conflict. It occurs if the woman has Rhesus “-”, the father has “+”. Then, when the baby inherits the paternal Rh, the body future mother capable of rejecting the fetus. Under such conditions, the possibility of bearing and giving birth to a full-fledged child is minimal.

What determines the blood type and Rh factor of the child?

The blood type and Rh factor are inherited from mom and dad. Why is this happening? In the process of interaction parent cells the child has its own individual genes that characterize the above indicators. They are formed in the first trimester of pregnancy and never change, so it is enough to calculate them only once.

The formation of these indicators depends on the dominant (suppressive) and recessive properties. Dominants (A and B) and weak sign (0):

• when a man and a woman have the first group with a recessive property (0), then the baby will certainly inherit it;
• the second group is formed in children upon receipt of antigen A;
• for the appearance of the third group, the dominant type of gene B is required;
• in order for a child to be born with the latter group, one parent must pass on gene A, the second - B.

The formation of the Rh factor occurs according to the same principle. Positive is considered dominant. recessive trait- negative. It is worth noting that 85% of all people can boast of protein in red blood cells and only 15% do not. As a donor for a person with a negative Rh, a carrier of both types can act, with a positive - having the same type. The ideal option It is considered a complete match of Rh and blood group.

How to calculate the blood type of a child from parents using a special table?

Many parents want to know whose blood group the child will have. For the definition, a special table was developed, thanks to which everyone can calculate the result. To do this, you only need to know the ownership parental blood to a specific group.

After studying the data of the table, it becomes possible to make the following decoding of it:

• provided that two parents have 1 group, the blood of the child will coincide with them;
• mom and dad with the same 2nd group will have children with 1 or 2 groups;
• if one of the parents is a carrier of group 1, the child cannot be a carrier of group 4;
• if the father or mother has group 3, then the probability of having a child with group 3 is the same as in the other three groups;
• if 4, then children will never be carriers of 1 blood type.

Is it possible to determine the Rh factor in advance?

It is possible to find out the Rh factor of a child, knowing this indicator from the father and mother, using the following scheme:

• if both parents have "-" Rh, the child will have the same;
• in the case where one is a positive carrier and the other is negative, six out of eight children will inherit a positive Rh;
• in parents with a "+" Rh factor, according to statistics, 15 out of 16 children are born with the same Rh and only one with a negative one.

The likelihood of Rh conflict in mother and children

Rhesus conflict - rejection of a fetus with a "+" Rhesus by a woman's body with a "-" indicator. Even in the recent past, under such conditions, the bearing and birth of a full-fledged child was simply impossible, especially if the pregnancy was not the first. The result of this process can be intrauterine death of the fetus, stillbirth and other negative consequences.

Currently, Rh conflict occurs only in 1.5% of cases. Its probability can be found after tests at the beginning of pregnancy or at the stage of preparation for conception. It is worth noting that even if two conditions are met (negative Rh of the mother and positive in the child), the development of a conflict is not necessary.

In this case, the pregnant woman will have to be regularly checked to determine the amount of antibodies and their titer. Depending on the results obtained, the full examination fetus. When a Rh conflict occurs in a child, hemolytic disease which leads to the birth ahead of schedule, anemia, dropsy or even death.

Modern medicine offers the only way saving a child with a Rhesus conflict - intrauterine transfusion blood under ultrasound control experienced doctors. This greatly reduces the likelihood premature birth and the development of hemolytic disease in the child. To reduce the likelihood of this problem, pregnant women are prescribed a certain course of therapy throughout the entire period, including taking vitamins, minerals, antihistamines and metabolic drugs. Delivery with a possible Rhesus conflict is recommended to be carried out ahead of schedule by caesarean section.

No woman can find out in advance the color of the eyes, the hair of the child, what the character and talents will be. Another thing is the blood type that will be passed on to the child. You can find it here and now. And so, how to find out what blood type the child will have, according to the blood type and Rh factor of the baby's parents.

First you need to know the Rh factor and the blood type of the parents. With this data, you can calculate the blood type of the child.
In the world it is customary to divide people into four blood groups, depending on the AB0 system. A and B are agglutinogens, or, in other words, erythrocyte antigens.

To find out your blood type, you need to take an analysis in the laboratory.

All people on our planet are divided into two types according to the Rh factor. Those who have these factors belong to the Rh-positive group, those who do not have them - to the Rh-negative group.

However, health is not affected by the absence of factors. What can not be said about women in position. They may have a Rh conflict with the baby, especially if the pregnancy is not the first (the presence of Rh in the mother, the absence of the child).

Theoretical inheritance of blood type

Turning to the science of genetics, blood groups and Rh factors are inherited by us. In order not to get confused, you will have to turn to biology in school subjects and trace this on various cases.

Parents pass on their genes to the baby, where you can find out if there are no or there are agglutinogens A, B and 0. Also trace the presence of the Rh factor.

Abbreviated blood types of human genotypes:

• 1 group (00). The first digit zero reads as follows: a person inherited it from his mother, the second received it from his father. Therefore, a person, by heredity, will pass on to his children 0 (the first blood group)
• Group 2 (AA or A0). Parents can give their baby A or 0
• Group 3 (BB or B0). Goes to either B or 0.
• 4 group (AB). Either A or B passes.

With regards to the Rh factor, it is the dominant feature, which means that if one or another Rh factor is transmitted to a child from one of the parents, in any case, it will be transmitted.

If parents are characterized by the Rh factor - negative, then it will also be characteristic of children in the future. If one parent has Rhesus, and if the other does not, then it can happen like this: it may appear in a child, or maybe not.

If the Rh factor is positive in both parents, then in approximately 75% of cases it is transmitted to the child.

But do not be surprised if in this case a child with a negative Rh factor appears. This happens when both parents are heterozygous (genes that are responsible for the absence or presence of the Rh factor). In practice, this is easily detected, you just need to ask questions to blood relatives. It is possible to find a person with a negative Rh among them.

Inheritance examples

The rarest, but the simplest such option is when both parents are carriers of the first negative blood group. Definitely exactly this group will get the child.

Another case. The mother is a carrier of the first positive group, and the father is a carrier of the fourth negative.

The following groups are also not excluded: 2 gr. (A0) or 3 gr. (B0). In such families, the child will not inherit the same group as his parents.
When a parent has a second negative group, the other has a third positive, then the child can be born with any existing indicator. Let's take an example. Mother carrier A or 0, father - B or 0. The child can inherit the following under such conditions: AB (fourth), A0 (second), B0 (third), 00 (first).

The schemes used, various tables and calculators are not enough to calculate the blood type. To specifically know the group of the child, it is necessary to pass the appropriate tests.

modern medicine and the latest technology on the this moment allow you to learn almost everything about the future baby. Up to what will be the color of the eyes of the child and even possible color hair. But the simplest in this world of knowledge is the method to find out the blood type of the unborn baby.

How to find out blood type by AB0

• If only A is the second blood type.
• If only B is the third blood type.
• If A and B - the fourth blood group.
• If 0 (zero) - the first blood type.

What blood type can a child inherit

• 00 (first blood type) - if the mother and father have the first blood type, the child will accordingly have the same.
• AA or A0 (second blood type) - the baby can receive either the second blood group or the first from the parents.
• BB or B0 (third blood type) - the child will get either the third group or the first.
• AB (fourth blood group) - it will be inherited either the second group, the third or (which is very rare) the fourth.

by the most rare groups blood is considered the fourth (both positive Rh factor and negative) and the first negative. But interesting fact is that, for example, if a child has the first blood type, only the first group will also suit him during a transfusion and no other. But the first group itself is universal, that is, suitable for any other. But the fourth group is suitable only for the same or the first. The second and third groups are the most common and are observed in most people.


Now there are many new laboratory tests, which can show what type of blood the child has and whether a Rh conflict can happen, but they are not always safe and can be quite painful, and are also carried out only with special purpose if there is a threat to the fetus or mother.