The times when one had to guess what gender a child will be born are a thing of the past. Today, for all pregnant women, an ultrasound scan is mandatory, which allows you to accurately determine the gender of the baby. If the mother does not want to use this method, or wants to give birth to just a boy (or girl), you can try to guess the sex of the child by the blood groups of the parents.
Combination of parent groups
This method offers a woman to choose the father of future children according to his blood type. However, the established couples can trace whether the theory works in practice. Some scientists offer complex tables with a percentage of the probability of giving birth to a boy or girl for all possible combinations of parental blood. But if you do not delve into the theory, then everything is not so complicated. There are four blood types. If the mother is the first, then when combined with odd groups, the probability of having a female child is high. Combinations with even (II or IV), most likely, will contribute to the birth of a male baby. It is easy to calculate the sex of a child’s blood type and for other combinations. Let's say the future mother has a second group. Then the calculations are carried out in exactly the opposite way to the above method. Women with the third blood group can try to get a daughter only with a man who has group I. Just like mothers with the fourth group, they can count on the birth of a girl from the owner of the II group. It is important to understand that this calculation method is not absolutely correct. Other factors affect the baby’s gender. A vivid example of this is large families with diverse children.
When is blood renewed?
You can try to calculate the gender of the child by the blood groups of the parents, focusing on the renewal of blood. It is believed that in women blood is renewed every three years, and in men - approximately every four years. There is an experimental theory that states that one of the parents has younger blood, the sex will be inherited by the child. But how at home to understand whose blood is "fresh"? For adults, an update should be considered from the moment of heavy blood loss. These are abdominal operations, serious injuries, childbirth and miscarriages. If nothing like this has happened to you, you can divide a person’s total age into 3 for women and 4 for men. It is worth noting that planning a child’s gender for blood based on this theory really often allows you to achieve a result.
The influence of the Rh factor on the floor of the baby
Do not forget that any blood group can be both positive and negative. Therefore, when calculating the sex of the child according to the blood groups of the parents, this factor must be taken into account. It is believed that if both parents are positive or negative, a girl will be born. Boys are more likely to be born with a combination of different Rh factors. Women with a negative value should be especially careful when planning a baby's birth. The likelihood of developing a Rhesus conflict is high if the child has a positive group. And let them predict the sex of the child by the blood groups of the parents, using the theory of a combination of Rh factors, it is absolutely not possible, it’s worth a try. It is likely that using all three of the methods described, you will get the right results.