Blood type and reproductive capacity

 

Every couple who has trouble conceiving is wondering why this is happening. One of the first answers to this difficult question is considered the so-called group compatibility of partners. Let's try to figure out how these partners' blood parameters affect conception and successful pregnancy.

A blood group is a system of individual antigenic characteristics of red blood cells. According to the data of the International Society of Blood Transfusion, today there are 36 known group systems. The most common and used in applied medicine are the international systems AB0 and Rh factor. To determine the blood group, a method is used to identify specific groups of proteins and carbohydrates that are part of the erythrocyte membrane structure. The system of characteristics is encoded in DNA and transmitted from parents to children.

In the AB0 system, 4 blood groups are divided: 0 (I), A (II), B (III), AB (IV). The first letter in the title indicates the type of protein located on the surface of the erythrocyte. For example, when we say that a person has a third blood group or B (III), this means that type B proteins are located on the surface of his red blood cells. The most common in the world (36.44%) is the first blood group 0 (I). What type of blood a child may have, depending on which groups are owned by his parents, will be shown in the table below.

Blood group of the other parent

Blood group of one parent

0(I)

A(II)

B(III)

AB(IV)

0(I)

0(I) — 100%

0(I) — 25%

A(II) — 75%

0(I) — 25%

B(III) — 75%

A(II) — 50%

B(III) — 50%

A(II)

0(I) — 25%

A(II) — 75%

0 (I) — 6,25 %
A (II) — 93,75 %

0 (I) — 6,25 %
A (II) — 18,75 %
B (III) — 18,75 %
AB (IV) — 56,25 %

A (II) — 50%
B (III) — 12,5%
AB (IV) — 37,5%

B(III)

0(I) — 25%

B(III) — 75%

0 (I) — 6,25 %
A (II) — 18,75 %
B (III) — 18,75 %
AB (IV) — 56,25 %

0 (I) — 6,25 %
B (III) — 93,75 %

A (II) — 12,5%
B (III) — 50%
AB (IV) — 37,5%

AB(IV)

A(II) — 50%

B(III) — 50%

A (II) — 50 %
B (III) — 12,5%
AB (IV) — 37,5 %

A (II) — 12,5%
B (III) — 50%
AB (IV) — 37,5 %

A (II) — 25%
B (III) — 25%
AB (IV) — 50%

 

The Rh system consists of 54 antigens, 6 of which are considered to be the most important. Approximately 85% of the world's population have a positive Rh factor (Rh +), and 15% have a negative (Rh-). Rhesus factor is also genetically determined. Rh + is a dominant trait. The Rh- and Rh- pair can have only Rh- children, and the parents of Rh- and Rh +, like Rh + and Rh +, can have both Rh + and Rh- children.

How can blood type affect reproductive ability and gestation?

Modern fertility specialists identify several factors that affect the conception and the course of pregnancy.

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