What factors in the family can lead to having a son but always having a daughter?

When couples are particularly stressed, it is easy to secrete acidic substances in the body, making it easier to have daughters.

Researchers from Oxford University in the United Kingdom and the United States asked 338 female participants who planned to get pregnant to record their life and sexual life, and to be monitored by stress hormone.

It was found that 58 gave birth to boys and 72 gave birth to girls. The normal ratio of male to female newborns in Britain is 2 1:20. The researchers found that women with the highest levels of stress hormones are 75% less likely to have boys than women with low levels of stress hormones, and this hormone also increases the risk of male fetal abortion.

Therefore, families who want to have boys should properly adjust their stress and keep relaxed during pregnancy, so it is easy to achieve their goals.

The average birth rate of girls in the western world is 48%, but among smokers, this ratio has risen sharply. Through the investigation of 9000 pregnant women in Liverpool, England, the doctors of Liverpool Tropical Medical College were surprised to find this imbalance. Mothers who smoke at ordinary times and during pregnancy have about 1/3 fewer boys than mothers who don't smoke.

If both parents smoke, the chances of having boys will drop by nearly half, and those passive smokers who live in a smoking environment will also have more girls.

Kristen Navarra, an endocrinologist at the University of Georgia in the United States, studied the official fertility data of 202 countries collected by the CIA in the past ten years, and found that the global birth rate of boys and girls was 5 1.3% to 48.7%, with men slightly more than women.

But according to latitude, the closer the mother lives to the equator, the more likely she is to give birth to a baby girl. On the contrary, the higher the latitude where the mother lives, the greater the possibility of giving birth to a boy.

Researchers from the University of Exeter surveyed 740 first-time pregnant British women. The results show that if a woman consumes more calories during pregnancy, her chances of having a boy are as high as 56%. On the other hand, if the calorie intake is low, the chance of having a boy is only 45%.

The researchers explained that the gender of a child usually depends on the father, but the mother also has some influence on its gender. If women consume more calories during pregnancy, it will promote the growth and development of male embryos and inhibit the development of female embryos. If women often skip breakfast, of course, they are more likely to have girls.

In short, parents should be calm whether they have boys or girls. It is a kind of fate for children to come to this family. It doesn't matter if they fail to realize their desire to have two children. As long as children live well and know how to be filial to their parents, having children is a blessing.