What's the reason for the decision

summary

When it comes to having a baby, in addition to the preparation before pregnancy, I'm afraid the most discussed one is having boys and girls. Almost every family hopes to have boys, but there are many mysteries about giving birth to boys and girls. The reason why giving birth to boys and girls is that I will tell you.

What's the reason for the decision

First, genetics: This is a situation excluding the influence of any external factors. It is not decided by the woman who gives birth to boys and girls, but mainly by the sex chromosome of the man. The sex chromosome, as the name suggests, is the chromosome that determines sex. There are 23 pairs of 46 chromosomes in human germ cells, of which 22 pairs are autosomal and one pair is sex chromosome. The sex chromosome of female is XX and that of male is XY.

Second: of course, there will be some external environmental impact on giving birth to boys and girls. Acid and alkali environment: Y sperm is alkali resistant but not acid resistant. In alkaline environment, Y sperm is active and easy to combine with eggs. In acidic environment, X sperm is active and easy to fertilize.

Third: age: older couples are more likely to have daughters than younger couples. There were more males than females between 25 and 29 years old, and more females under 25 and over 29 years old than males.

matters needing attention

Usually to avoid excessive fatigue, more to ensure adequate sleep. Keep a good mood and avoid being too nervous and depressed. But also to strengthen physical exercise, enhance the body's resistance.