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青春期是指从儿童期过渡到性成熟期的中间时期,也就是说从性器官开始发育、第二性征出现至生殖功能完全成熟、身高增长停止的时期。青春发育期可分为3个时期:①青春早期:从第二性征开始出现至月经初潮止,年龄为9～12岁,以体格发育为主;②青春中期:以性器官及第二性征发育为主,
Adolescence refers to the transition from childhood to the sexual maturity of the intermediate period, that is, from the beginning of sexual organ development, secondary sexual characteristics appeared to reproductive function fully mature, height growth stopped. Puberty can be divided into three stages: ① early youth: from the second character began to appear until the menarche, age 9 to 12 years old, mainly to physical development; ② mid-adolescence: sexual organs and secondary sexual characteristics Development-based,