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男子性发育成熟的标志有三: (1)生殖器官发育完全正常。(2)出现第二性征,如出现胡须和声音变粗。(3)开始出现性欲和遗精现象。 医学上把男子的性生理发育分为五个阶段,即(1)青春前期:指出生到儿童睾丸开始发育(大约7—8岁)。(2)睾丸阴囊发育期:约在9—12岁左右出现阴囊增大、变红和皮肤皱折。(3)阴茎发育期:阴茎明显增长,伴有少量阴毛、腋毛和胡须,约在12一16岁。(4)性器官准成熟期:阴茎、阴囊进一步增
Men have three signs of sexual maturity: (1) reproductive organ development is completely normal. (2) secondary sexual characteristics, such as beard and voice appear thicker. (3) began to appear sexual desire and spermatorrhea phenomenon. Medical men’s physiological and physiological development is divided into five stages, namely (1) early youth: that the birth of children’s testes began to develop (about 7-8 years old). (2) Testis scrotum Developmental period: about 9-12 years old appear scrotum increases, redness and skin wrinkles. (3) penile development: the penis was significantly increased, accompanied by a small amount of pubic hair, armpit hair and beard, about 12-16 years old. (4) normal sexual maturity stage: the penis, scrotum further increase