5 Easy Facts About testosterone Described
At about 7 days seven in utero, the sexual intercourse-relevant gene on the Y chromosome initiates the event with the testicles in male infants. The testicles generate 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In individuals, m