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Blood typing is a method of determining a person's blood type by serological methods. These blood types depend on whether or not there are certain antigens on the red blood cells & if there are antibodies to these substances. By careful planning a couple can decide & project its child’s blood type which is quite important because not all blood groups are compatible with each other & if child & mother are of incompatible blood types, mixing of their blood may lead to blood clumping or agglutination, which may be fatal for both mother & the baby.

Deciding your child's blood type:

Each biological parent donates one of the two A/B/O alleles to his/her child. Alleles are possible types of a particular gene, in this case the blood type gene. There are three basic blood type alleles: A, B, and O which codes for A, B or none of the RBC surface antigens that decide corresponding blood types respectively. Children have two alleles, one inherited from each parent. The possible combinations of the three alleles are OO, AO, BO, AB, AA, and BB. If the parents don’t know their blood type, there are lots of easy ways to learn the blood type.

Consequently, a person with blood type B may have a B and an O allele, or they may have two B alleles. If both parents are blood type B and both have a B and a recessive O, then their children will either be BB (if each parent passed on the B allele), BO (if one parent passed on B and the other parent passed on O), or OO (if both parents passed on the O allele). If the child is BB or BO, they have blood type B. If the child is OO, they will have blood type O.