Why are men generally taller than women?

According to the research of foreign experts, people's height is closely related to the development of lower limb bones. Scientists selected some men and women with normal development for key research, and found that the difference of trunk length between men and women of the same age is not so significant, but the difference of lower limb length is extremely obvious.

For this reason, some people have further studied the characteristics of bone development of men and women before and after sexual maturity, and finally revealed the mystery that men are taller than women: from birth to adolescence, the bone development of men and women grows in waves, increasing by 3 ~ 7 cm every year, with little difference in height.

During adolescence, girls (13 ~ 18 years old) develop rapidly. In junior high school, girls can surpass boys in height. By the age of 18, the developmental stage tends to "end", the bones of lower limbs no longer grow, and the height is "stable".

Boys' puberty (15 ~ 20 years old) starts late and ends relatively late. And after puberty, the bones of the lower limbs will continue to grow, usually until the age of 23. From this point of view, the puberty of men is about 5 years longer than that of women, so generally speaking, men are generally taller than women. Even if * * * has parents, the height genes of boys and girls are almost the same, and the height cannot be exactly the same. Because innate genes cannot completely determine the acquired height. As long as the child's nutrition and exercise, including the living environment, meet the best conditions for growth and development as much as possible, then the child may break through the gene and grow taller. Whether it is a boy or a girl, the height in the future will be affected by the amount of activity. The greater the activity, the greater the possibility that children will grow taller in the future. Under normal circumstances, boys are more lively than girls and have a lot of exercise, so they will be stronger than girls in physical exercise and it is normal to be taller than girls.