What constitution does a man need to have a daughter? 1. A man with many sisters at home.
British scientists have found in their research that the probability of a boy giving birth to a girl is also related to innate genes. Specifically, if a male has more family sisters, his sperm is more likely to carry X chromosome, and it is easier to have girls.
Second, older men.
It is an indisputable fact that both husband and wife are more likely to have daughters when they are older. This is because with the increase of age, the number of male sperm will decrease, and the physiological hormones of women will change with the increase of age, so that the alkaline excreta in the body will decrease year by year. The less sperm there is in a male with Y chromosome, the higher the probability of giving birth to a girl.
Third, men who exercise a lot.
It is confirmed by most reproductive medicine experts that men often exercise, and a large amount of lactic acid will be produced in their muscles, which will lead to a large amount of acidic substances in the body. Men who exercise regularly consume more energy, and most of the energy is acidic, which will make the athletes' whole body acidic. However, sperm containing Y chromosome is more active in alkaline environment and has a greater chance of giving birth to boys. Sperm containing X chromosome is more active in acidic environment, and it is easier to give birth to girls.
Fourth, thin people.
Researchers in China studied the possibility that the observed weight of 8,500 couples receiving fertility treatment would affect them. Among them, the thin couple gave birth to 6 1 1 boys and 569 girls. The proportion of boys born in overweight and obese families is 27% higher than that of normal men.
5. Overworked man
Men who are under too much pressure and are often in a state of fatigue, or men who are similar to the IT industry, often stay up late, sit still for a long time, lose their physique, and their testicles are in a sultry state for a long time, which easily affects the survival rate and quality of sperm. I hope that male friends can exercise moderately, reduce mental stress, don't hurt sperm, and it is difficult to become a "father".
The scientific method of giving birth to a girl: 1. Diet regulation
In fact, the method of giving birth to a girl is similar to that of giving birth to a boy, but the preparation direction is a little opposite. For example, if you want to have a boy, you should lean on the alkaline side as much as possible, and if you want to have a girl, you should lean on the acidic side. Therefore, if you want to have a girl, the woman can eat more acidic foods, such as loach, beef, pork, chicken, oranges, strawberries, grapes and so on. So that the body is acidic. Men can eat more alkaline foods such as milk, flour products, tea, kelp, seaweed, iodine, vitamin D, etc., so the probability of giving birth to girls is likely to increase.
Second, make the vagina acidic.
Since I want to have a boy to make my vagina alkaline, having a girl is naturally acidic. Because X and Y sperm swim at different speeds in different pH environments, X sperm is more active in acidic environments. Therefore, if couples want to have girls, they can take advantage of the above characteristics. Before sexual intercourse, after diluting acetic acid with a small amount of clean warm water, the woman washes the vagina to make the vagina present an acidic environment, thus improving the probability of giving birth to a girl.
Third, try to avoid orgasm.
The orgasm mentioned here is for the woman. If she wants to have a girl, she should try to avoid orgasm during sex, because when she reaches orgasm, it will enhance the alkalinity of the vagina, which is not conducive to the activity and growth of X sperm. At the same time, couples who want to have girls should have more sex, because the more times they have sex, the less the number of Y sperm can be, but it should be moderate. In addition, couples who want to have girls should stop having sex three days before ovulation.