Not known Facts About matas
At all over week 7 in utero, the sexual intercourse-connected gene about the Y chromosome initiates the development of your testicles in male infants. The testicles develop testosterone.层次（鞘膜 · 白膜 · 血管膜） · 附件 · 纵隔 · 小叶 · 隔片 · 莱迪希细胞 · 塞尔托利氏细胞 · 血睾屏障維持性慾