INFO:

男孩生殖器发育是从青春期开始，一般在10-14岁开始发育。我国男生青春期开始时间平均年龄为12-13岁，每个男孩外生殖器发育存在个体差异，刚出生男孩外生殖器相对较小，一般3周岁以内外生殖器生长速度有限，3周岁到青春发育期前，外生殖器都会随儿

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乳房发育 男孩生殖器发育的时间

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