Why do some couples "always have girls"? Besides heredity, what other reasons are also key?

With the continuous progress of society, young people nowadays don't care much about having boys and girls. For them, boys and girls are all the same, and they are all their own children. As long as you train well, you can get ahead and become the pillar of your family. But people in China all have this idea, and "having two children" is perfect. Therefore, even if many couples do not have the idea of son preference, the first child is a daughter or wants to have a son, and the first child is a son or wants to have a daughter. After all, now that the second child is open, there is no limit to having more children.

However, often these couples who want "two children" can't realize their wishes in the end. A couple gave birth to 12 children in succession in order to have a son, because the first 1 1 child was a daughter, and the first 12 child was a son. Many netizens also said that their family has "should the throne be inherited?" However, apart from teasing, let's not talk about why some couples "always have girls."

Why do some couples "always have girls"? Heredity is one of the factors.

There is a saying in the older generation that if a family has more daughters, then the concept of daughters of future generations will be higher. But this is only a question of probability, not absolute. There are also families that have boys, but descendants have daughters. Therefore, heredity is not absolute. However, if there is a precedent for parents to have twins, then the probability of having twins is indeed higher. However, we should not take this factor too seriously, because this probability is actually random.

In addition to heredity, these reasons are also the key.

The first reason: male chromosomes.

It is the male chromosome that determines the sex of the baby. Male chromosomes have X type and Y type. Sperm carrying X chromosome combines with egg, so the baby is a girl. If the sperm carrying the Y chromosome is combined with the egg, then the baby is a male treasure. So having boys and girls is directly related to dad. If every pregnancy is a combination of X chromosome and egg, it will naturally give birth to a daughter all the time.

The second reason: husband and wife's physique.

Everyone's physique is different, such as pH value. The pH of husband and wife's body will determine the sex of the child to some extent. Y sperm is alkali-resistant but not acid-resistant. Y sperm is active in alkaline environment and easy to combine with eggs. X sperm is active in acidic environment and easy to fertilize. In addition, it is also related to the health of the couple. Therefore, it is very important for couples not to have too much pressure during pregnancy and to maintain a relaxed state.

The third reason: the age of both husband and wife.

Both men and women have a suitable pregnancy age. The suitable pregnancy age for men is 30-35 years old, and that for women is 23-30 years old. After the age of pregnancy, the number of sperm in men will decrease, and after the age of pregnancy, the acidity in women will be greater than the alkalinity, which is not conducive to the combination of Y chromosome and egg, and the concept of having a daughter will be greatly improved. Therefore, the couple have been giving birth to girls, which is actually related to age.

The above reasons are the key reasons why they "always have daughters". In fact, boys and girls are all the same, so why should we have both children? Now the two-woman family is also happy, because the daughter is caring, sensible and filial to her parents, which is much more reliable than the son. Therefore, for the baby's gender, parents should relax and let nature take its course. Too much attention will backfire.