Sperm motility and the relationship between the sex of the baby

In the past, many men blamed women for the birth of a boy or girl. Especially for those men who have a strong concept of male superiority and female inferiority, if a woman gives birth to a daughter, it is the beginning of suffering. In fact, the birth of a boy or girl is not only a matter of women, but also has a great relationship with men. Don't blame women blindly. The birth of a boy or girl is also related to genetic inheritance. Let's let science explain. If there are more brothers than sisters in a man's family, the probability of having a boy is higher. The larger the ratio, the higher the probability. On the contrary, if there are more sisters than brothers, the birth of girls is more likely to be boys. Since the birth of a boy or girl is decided by men, it is important to observe the male family.

Men's temperament: those who are self-righteous, rough, and don't like housework are mostly boys. If men like to clean and are meticulous, they are mostly girls. Mothers who are often domineering and hold power in their hands are more likely to have boys because their testosterone is stronger. Mothers with gentle and docile temperaments are relatively more likely to give birth to girls. Mothers with strong dominance will have higher testosterone in their eggs, and they are good at accepting Y chromosomes in sperm.

The most important indicator of the pregnancy environment is the pH of the female body. If the pH of the pregnancy environment provided by the woman is strongly acidic, the probability of having a boy will increase greatly, otherwise the probability of having a girl will increase greatly. The more flavorful the diet, the higher the probability of having a boy, and the lighter the taste, the lower the chance of having a girl. The lower the labor efficiency of women, the lower the chance of having a boy, and the higher the stress resistance, the higher the chance of having a girl. Therefore, if the wife often cooks for the child after a period of marriage, it will reduce the male's dominant position in having a boy or a girl. Diet and energy consumption continuously change the pH of women's bodies, affecting the pregnancy environment, and also affecting the pH of men's bodies, affecting the production of sperm, so it is very important. More sexual activity during pregnancy increases the chance of having a daughter, and less sex increases the chance of having a boy, because the growth and development of male sperm is slightly slower. In layman's terms, immature sperm is always running an adult sperm.

The older the couple is, the greater the chance of having a girl. Because age affects the physical qualities of both parties, the number of sperm in men decreases with age, and the older the woman is, the more physiological growth hormone changes, which will gradually reduce the alkaline substances in the uterus, and the chance of having a girl will also increase significantly. A US study found that for every 5 years of age increase in the couple, the chance of having a girl increases by 1%. If the husband is too old, the chance of having a boy decreases. Men aged between 25 and 29 have more boys than girls, and those under 25 and over 29 have more girls than boys.

If the male ejaculates shallowly, the sperm will take longer to reach the uterus; conversely, if the male ejaculates deep, the sperm can reach the uterus as early as possible. Therefore, if you want to have a boy, ejaculate into the shallow layer of the vagina during sex, which is conducive to the Y sperm appearing around the cervix, avoiding the difficulty of wading through the cervical mucus; if you want to have a girl, ejaculate into the shallow part of the vagina, which is conducive to increasing the difficulty of Y sperm to cross the distance, so that X sperm can be seen and merge with the egg cell. French scholars have found that April to June is the month with the most boys born, and October is the month with the least boys born. Further analysis shows that high temperature environments are more likely to produce boys, while ultra-low temperature environments are more likely to produce girls. The hypothesis is that high temperature affects the X chromosome of sperm, making it difficult for girls to be born; ultra-low temperature affects the Y chromosome of sperm, making it difficult for boys to be born. What researchers are more worried about is that under global warming, the probability of boys being born will become higher and higher, which may lead to a gender imbalance. But it is also closely related to physical fitness.

According to statistical analysis reports, men who work as long-term drivers (such as taxi drivers, freight drivers), flight attendants or pilots, anesthesiologists, and office workers who sit for long periods of time or are exposed to radiation from electronic products for long periods of time have a very high probability of having a daughter. This is because the male testicles are exposed to high temperatures, significant changes in standard air pressure or radiation sources, or they inhale too much harmful anesthetic gas, causing the less vigorous Y male sperm to die first, resulting in a high chance of having a daughter. However, overseas statistics show that manual laborers are 40% more likely to have a daughter than those who work with mental labor. This is caused by some men who often come into contact with organic chemicals or swallow drugs by mistake, and organic chemical preparations greatly reduce the number and quality of sperm. In addition, people who live in areas with more serious environmental pollution and dense population tend to have more daughters.