Determining a child’s blood type by parent blood - why is this necessary?

Knowing the blood type of the child is the responsibility of the parents. First of all, in case he needs an immediate transfusion. In the vast majority of modern maternity hospitals, a blood sample is taken from newborns, and the result of the tests is recorded on the card. But this is when the child has already been born. Some curious young parents are just wondering which group their offspring will live with, some want to reconcile their food preferences with their child's ability to perceive them - Ayurvedic practices correlate nutrition with blood type.

We will not mention the sad situations when the future dad doubts his paternity. However, if you determine the blood type of the child in advance by the blood of the parents, you can get confirmation of doubt or a refutation. But not always.

"Blood" groups in humans

It is clear that in order to use the methodology by which the blood type of a child is determined by the blood of parents, one must at least know the group and Rhesus of the latter. There are only 4 groups; according to the most common system today they are encoded with the AB0 symbols. Rhesus - two (positive and negative). Both Rhesus and the group are inherited in the same way as other genetic traits. Previously, tables were distributed using the “from hand to hand” method, according to which the status of intravenous fluid could be calculated. Now the definition of the child’s blood group by the blood of the parents has become much simpler: you can try to calculate the group of the planned child right now on this table.

Probabilistic calculation for a group of parents

Nuances of calculations

It is useless to turn to all calculation methods if someone has a third positive couple and a second partner with a negative Rh factor in a married couple . They have an equal chance of having a descendant with any group. And if the definition of the blood type of the child by the blood of the parents was carried out by the pope out of a feeling of jealousy and vague suspicions, then all efforts will not confirm and refute them.

This method will not help in any way when blood is transfused (especially in large quantities), or if the so-called "blood chimeras" are present in the body. The consequences of both of these give incorrect results, and determining the blood type of a child by the blood of parents is not authentic.

There is another option in which the technique does not work. True, it is characteristic only for residents of sultry India, but where is the guarantee that not one of your ancestors was born of a Hindu? Such an exception was given the speaking name “Bombay phenomenon”: with it, the child’s genes contain both antigen A and antigen B, and the blood does not contain them. What forecasts are there ...

Soft tip

If you look, then a simple curiosity or the desire to accustom a child to vegetarianism can wait before delivery. The determination of the blood type of a child (still unborn) makes sense only in the case of a Rhesus conflict between him and his mother. But doctors are also coping with this. And everything else will wait until discharge from the hospital.

For suspicious

You can only sympathize with those who, on the threshold of fatherhood, are tormented by doubts and suspicions. Do not spoil the relationship with your wife just because your calculations did not coincide with the result. Firstly, no one is safe from mistakes. Secondly, calculations are calculations, but analyzes are more reliable. Third, determining the blood type by parent is not an argument for the allegations. If you are already so plagued by suspicions, you will have to turn to DNA analysis. Naturally, when the child is already born.