What kind of physique is likely to give birth to a boy? What kind of physique is likely to give birth to a boy?

I recently heard that people with alkaline constitution are more likely to give birth to boys. Is that true? If this is not true from a biological point of view, because the determination of whether a baby is a boy or a girl is related to chromosomes, then let's see how the experts explain it below!

Is it reliable? To have a son? Is it easier if a man has a good physique?

The idea that "a man's physical fitness affects the sex of the fetus" holds that X sperm and Y sperm have different characteristics, lifespans, and morphologies. Y sperm has a short lifespan, is relatively fragile, and has a weak ability to adapt to the environment. If a man often works overtime, stays up late, smokes, drinks, and is too tired during the pregnancy preparation period, it will lead to the loss of Y sperm, or insufficient vitality, and unable to pass through the sticky cervical mucus to meet the egg; while the sperm with X chromosomes has more endurance and longer life, so it will naturally have the upper hand in the "battle" for combining with the egg. Therefore, men are more likely to give birth to girls when they are physically tired, and are more likely to give birth to boys when they are in good physical condition.

This statement is unreliable, don't believe it

This statement seems to make sense on the surface, but its basis is completely unfounded. Are X sperm and Y sperm really that different? In fact, as early as 2001, a study showed that there was no significant difference in the size, shape, tail length and other characteristics of X and Y sperm. Therefore, the so-called appearance, speed, and survival rate should be basically the same, with no difference. Whether giving birth to a son or a daughter, good physical fitness is required.

Men's physical fitness affects sperm quality

Although the quality of a man's physique does not really allow X sperm and Y sperm to selectively survive, this statement has led many men who want to have sons to exercise hard and improve their physical fitness.

A man’s physical fitness does not affect whether he will have a boy or a girl, but it does affect the quality of his sperm, which in turn affects the success rate of conception and also affects eugenics. Studies have shown that long-term bad habits such as smoking, drinking, and staying up late can cause abnormal sperm quality, kill sperm, increase the number of abnormal sperm, and make males infertile or give birth to deformed fetuses.

Experts remind: Regardless of whether you want to have a boy or a girl, healthy sperm and high-quality eggs are needed to combine. You cannot subjectively think that a man with good physique can give birth to a son, but if you want to give birth to a daughter, physique does not matter. Only by improving sperm quality can we produce better offspring. Therefore, before having children, men must exercise more, avoid high temperatures, quit smoking and drinking, avoid radiation, ensure adequate sleep, and maintain physical and mental health.