Sperm quality and the gender of the baby

Does the quality of sperm have anything to do with whether a baby is a boy or a girl? Who determines whether a baby is a boy or a girl? The answer to this question is "boys". It is also widely believed that men's physical fitness affects the gender of the fetus. Is this true? This theory is also analyzed from the perspective of sperm. We know that there are two types of sperm, one with X chromosomes and the other with Y chromosomes. If a sperm with X chromosomes fuses with an egg cell, a girl will be born, and if a sperm with Y chromosomes fuses with an egg cell, a boy will be born.

The saying "male physique affects the identification of the sex of the fetus" believes that X-male sperm and Y-male sperm have different characteristics, lifespan and shape. Y-male sperm has a short cycle, is more sensitive, and has a weaker adaptability to the natural environment. If a man often works overtime, stays up late, smokes, drinks, and is too tired during the pregnancy preparation period, it will cause the loss of Y-male sperm, or lack of energy, and unable to pass through the sticky cervical mucus to meet the egg cell; while the sperm of men with X chromosomes has longer physical strength and longer lifespan, and of course they will take the initiative in the "defense battle" of fusion with the egg cell. Therefore, men are more likely to conceive girls when they are physically tired; when they are in better physical condition, they are more likely to conceive boys.

This kind of name seems to make sense on the surface, but its basis is not established at all. Are X-male sperm and Y-male sperm really that different? In fact, as early as 2001, a scientific study confirmed that the size, appearance, tail length and other characteristics of X- and Y-male sperm are the same. Therefore, the so-called appearance, speed, and survival rate should basically be the same and there will be no difference. Whether it is a boy or a girl, a good physique is required. In addition, in modern society, men generally have greater work pressure and are physically exhausted, and there is no sign that the fertility rate of girls has significantly exceeded that of boys. If many people believe this, and they have a very good physique, and they want to have a daughter, they often stay up late, drink, smoke, and make themselves extremely tired... Why is it so? Will it really succeed? Not necessarily.

Men's physical fitness does not affect whether they have a boy or a girl, but it does affect the quality of male sperm, which in turn affects the success rate of pregnancy and also affects eugenics. Smoking: Studies have shown that long-term smoking by men is not only harmful to the body, but also easily leads to a decrease in male sexual interest, and even leads to a decrease in sperm density and deformity, causing male infertility. The tar in the smoke is a catalytic substance in sperm formation, which can affect the perfection and reproduction of body cells. Male sperm is delicate in nature and is easily damaged. Staying up late often: If men stay up late for a long time and lack adequate rest, in addition to lack of energy, too little sleep at night will disrupt the metabolism of growth hormones, causing problems with the vaporization function of sperm at night, affecting fertility, and easily leading to abnormal sperm. Therefore, in order to have good birth and improve the quality of sperm, men must pay attention to exercising their physical fitness.