不可思议:鲜为人知人体十大最不寻常秘密(图)(6)

2007-09-06 09:20:37 【大中小】发表评论

    6、数以千计的卵子不被卵巢利用

    当女人到了50岁左右时，控制荷尔蒙和生育的每月一次的月经就逐渐消失了。她的卵巢就产生越来越少的雌性激素，她的没有成熟的卵子不再像先前那样有规律的排放到子宫中。年轻女子平均有34,000个没发育的卵泡，然而，她整个一生也只有350个卵泡发育成熟。没被利用的卵泡就开始退化，然后就不能再怀孕，大脑就会控制停止排卵。
     不可思议:鲜为人知人体十大最不寻常秘密(图)

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