times when you had to guess the sex of a baby, leave in the past.Today, for all pregnant women necessarily ultrasound, allowing to accurately determine the sex of the baby.If the mother does not want to use this method, or wants to give birth to a boy is (or girl), you can try to guess the sex of a child by blood groups of parents.
combination of groups of parents
This method offers the woman to choose the father of future children of his blood group.However, and established couples can trace, whether the theory in practice.Some scientists suggest complex tables with percentages of probability of the birth of a boy or girl for all possible combinations of blood parents.But if you do not go into the theory, it's not so difficult.There are four blood groups.If the mother she was the first, when combined with odd groups likely birth of a female child.Combined with the even (II or IV), it is likely to contribute to the birth of a male baby.It is easy to calculate the blood group and sex of the child for the rest of combinations.Let's say the second group of future moms.Then the calculations are completely opposite way the process described above.Women with third blood group may try to acquire only daughter with a man having a group I.Just as a mother and the fourth group can count on the birth of a girl from the owner of Group II.It is important to understand that this method of calculation is not entirely true.On the sex of the child is influenced by other factors.An illustrative example - large families with children of different sexes.
When blood is updated?
sex of the baby on blood groups of parents can try to figure out focusing on the updating of the blood.It is believed that the blood of women is updated every three years, and men - approximately four.There is an experimental theory, which states that one of the parents of younger blood, sex of the child and will inherit.But in the home to see whose blood "fresh"?For adults, the update should be considered since large blood loss.This abdominal surgery, serious injury, childbirth and miscarriages.If anything like that happened to you, you can divide the full age of the person on the 3 - for women and 4 - for men.It is worth noting that planning sex of the child by blood, based on this theory really often achieves results.
Influence of the Rh factor on the floor baby
Do not forget that any group of blood can be both positive and negative.Therefore, relying on the sex of the baby blood groups of parents, must take into account this factor.It is believed that if both parents are positive or negative, will be born a girl.Boys often are born with a combination of different value Rh factors.Women with a negative value should be particularly attentive to the planning of the child's birth.Chances of Rh-conflict, if the child has a positive group.And let predict the sex of a child by blood groups of parents, using the theory of combinations of Rh factors, exactly is not possible, it's worth it.It is likely that using all three methods described, you get correct results.
