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青春期的年龄划分世界卫生组织将青春期年龄范围定为10~24岁。我国一般把青春期年龄范围定为10~20岁。其中10~13岁为青春前期,14~16岁为青春中期,17~20岁为青春晚期。青春前期:女孩出现月经初潮,男孩睾丸发育出现首次遗精,是进入青春期的标志。在此以前两年左右,女孩最早出现乳房发育,骨盆开始变宽,臀部变圆,身高及体重增长速度超过平均数;男孩睾丸、阴茎开始发育,身高、体重也迅速增加。青春中期:又称性征发育期,在身高剧增的同时,生殖器官及第二
Adolescent age division World Health Organization set the adolescent age range of 10 to 24 years old. Our country generally set the adolescent age range of 10 to 20 years old. Among them, 10 to 13 years old are pre-adolescent, 14 to 16 years old are mid-adolescence, 17 to 20 years old are late adolescence. Pre-teen: girls appear menarche, the first testicle spermatorrhea in boys, is a sign of adolescence. In the previous two years or so, girls first appeared breast development, pelvis began to widen, buttocks rounded, height and weight gain more than average; boys testicles, penis began to develop, height, weight also increased rapidly. Middle age of youth: also known as sexual development, growth in height at the same time, the reproductive organs and the second