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按生长发育的一般规律,在约20年的发育时间里,人体生长有两次突增期。第一次是胎儿期,并延续至生后1～2年;第二次是青春发育初期。人类的生长发育进程具有性别差异,一般是男孩12岁左右、女孩10岁左右进入青春发育期。此时,身高生长加速,性发育开始,机体的各器官系统逐步向成年人转化,到女孩17～18岁,男孩22岁左右身高基本停止增长。青春发育初期的3年是孩子身高突
According to the general law of growth and development, in about 20 years of developmental time, there are two sudden growth of human growth. The first is the fetal period, and extended to 1 to 2 years after birth; the second is the early stages of youth development. Human growth and development process has a gender difference, usually about 12 years old boy, the girl about 10 years into the puberty. At this point, the height growth accelerated, sexual development began, the body’s organ system gradually transformed into adults, to the girls 17 to 18 years old, the boy 22-year-old height basically stopped growing. 3 years of early youth is sudden height of children