Normal pubertal development age: girls usually start from 10 years old to about 18 years old, boys start from 13 years old to about 20 years old. Normal puberty development characteristics: after children enter puberty, physical growth suddenly accelerates, weight and height growth increases, while the development of the reproductive system tends to mature, sexual characteristics gradually become obvious, girls show breast development, followed by pubic hair, axillary hair and the first menstruation, boys show testicular and penile enlargement, may have ejaculation, followed by the appearance of throat knots, voice thickening, growing beard, pubic hair and axillary hair, etc. What is early sexual maturity? Precocious puberty is diagnosed if the above-mentioned sexual characteristics appear before the age of 8 for girls and 9 for boys, or if the first menstruation occurs before the age of 10 for girls. What are the dangers of precocious puberty? 1. Short stature due to accelerated skeletal growth and early epiphyseal closure of the affected child, affecting adult height. 2, affect the psychological development because the affected children puberty early, but the intelligence and sexual psychology is not yet mature, easy to occur social problems, and cause mental and life burden to the long. Why does precocious puberty cause short stature? When precocious puberty occurs, a large amount of sex hormones are secreted in advance, which accelerates the growth of the child’s height and makes the child’s height temporarily higher than normal children. How should precocious puberty be treated? Precocious puberty treatment is aimed at improving adult height as the core, and attention should also be paid to preventing psychological problems associated with precocious puberty and early menarche. GnRH analogues are usually used for treatment. After six months of treatment, the growth rate will generally fall back to the prepubertal level (about 5 cm/year); some children have a growth rate <4 cm/year after 1-2 years of treatment, at which time it will be difficult to improve their adult height with continued GnRHa treatment.