Once a girl’s menarche arrives, parents will come to the hospital with great concern to ask, “Is the child not going to grow any taller?” If parents find that their child’s breasts are enlarged and secondary sexual characteristics appear, they will also rush to the hospital and ask the doctor to prescribe some medicine, hoping to inhibit the child’s development, or at least slow it down a bit and delay the menarche as much as possible, with the ultimate goal of making the child taller. We say that these parents’ ideas are not unreasonable, because the onset of menarche indicates that the child’s height acceleration period has passed, but there is still a slow growth in height, after 2 to 3 years, the development stops and height growth also stops, with an average growth of 5 to 7 cm, and individuals can reach 12 cm. Sexual development and physical development during puberty are parallel, and menarche is an important sign of the development of sexual function, appearing in the middle of puberty, after the growth spurt and the full development of secondary sexual characteristics, so people often use menarche as a sign to observe changes in height, weight and body composition. A year to a year and a half before the menarche, height and weight increase sharply, when the menarche comes, height and weight are already in the deceleration period, the amount of height growth after the menarche varies with the early and late age of the menarche.