Before birth, parents think about what type of blood the child will have. If there is a discrepancy, then the man has doubts about the woman’s loyalty, and she has a slight bewilderment.
In fact, the baby's blood group is the result of the interaction of two parents, and it consists of what is inherited from one and the other person.
Before arguing, it is worth understanding how the blood type is generally determined.
Blood composition
Plasma (the liquid part of the blood) contains substances called agglutinins (they are designated as a and b ), and red blood cells have agglutinogens on their surface (indicated as A and B ). Due to the fact that A and a cannot exist together, just like B and B , there are 4 types of blood, which can be schematically represented as follows:
Group I - 00 (no agglutinogens) av (there are both agglutinins)
Group II - 0A (has A agglutinogen) in (there is 1 agglutinin)
Group III - 0B (has B agglutinogen) a (there is 1 agglutinin)
Group IV - AB (has both agglutinogens) 00 (does not have agglutinins)
Therefore, incompatible blood cannot be transfused; a meeting between A and a or B and B may occur, which will lead to the adhesion and destruction of red blood cells.
What blood type will the child have?
Speaking conditionally, the baby inherits one half of the gene material from the mother, and the other half from the father. This also applies to blood.
For example: provided that the mother has group I (00) and the father has IV (AB), the child can get a II (0A) or III (0B) blood group.
I and I will give only I group, I and II - only II and I, while I and III - only III and I, and parents with II and II group can give birth to a child with I and II gr. cr., groups III and III can give I and III, and II and III can give all 4 types of blood, while IV and IV give II, III and IV.
It is clear that it is impossible to unequivocally say what type of blood the child will have, but it can still be assumed.
Hence the conclusion that in the presence of one parent with group I, the child can not be born with the fourth group of blood, and, conversely, with the presence of the fourth group in one of the parents, the child with the first group cannot be born. cr.
Rhesus factor
Blood also contains a substance called the Rh factor. 85% of the total number of people have it (they are called Rh-positive), while the remaining 15% do not have it (Rh-negative). Positive blood cannot be transfused for those who have Rh negative.
The child can inherit this factor from both the father and the mother. Two Rh-positive parents can have a Rh-negative child, and this is also normal.
Blood type value
Do not worry, because the blood type of the child and its rhesus should be determined shortly after birth in the hospital. This procedure requires reagents and very little time.
Knowledge of this issue has two sides: moral and ethical and medical.
To know what type of blood a child needs, this can be useful for injuries requiring transfusion. Of course, before the procedure, the compatibility of the donor and the recipient (who is the recipient) must be checked, but in urgent situations, when the bill goes for minutes, valuable time will be saved.
It is important to know your Rh factor, especially for girls. Rhesus pregnant women with negative blood should be under the strict supervision of doctors, because there may be a Rhesus conflict between the mother and the fetus if he inherits Rh-positive blood from the father.
Mismatch in blood type can alert the child himself when he grows up. And if he knows exactly what type of blood the child will have when mixing the other two, he may have versions such as having a step-father or both parents. It becomes a difficult test, especially in the teenage period. The maximalism inherent in most adolescents makes it difficult to accept the situation and say “thank you” to parents for giving him the opportunity to grow up in the family.
But it is also possible that a mutation has occurred, and although it happens extremely rarely, it should not be ruled out. To date, such an indicator as a blood group cannot be a proof of kinship; DNA analysis is necessary in court.