命 运
是不是那样雷电交加的夜晚,你才会那样欲火焚身的想起我
- 注册
- 2004-11-04
- 帖子
- 11,931
- 反馈评分
- 0
- 点数
- 61
- 年龄
- 38
一、精子,在性交过程中,大约有3亿精子可能会进入**。
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
二、但是只有一个精子可能穿过重重障碍,使卵子受精,最终制造出一个胚胎。
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
三、卵子经过大约15厘米长的、狭窄的输卵管向子宫游动,它周围的营养细胞像一串串美丽的光环围绕着它。很快,它将与精子相遇并开始受精的过程。
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
四、一个精子试图进入卵子的瞬间
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
五、此时精子的头已经钻进去了,我们还可以看到它的中部和尾部,它就像一个不断旋转的钻头,在尾部拍打的驱动下,努力进入卵子。
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
六、第1周,在受精之后几小时之内,受精卵开始分裂。1周以后,这个小圆球将自己附着在子宫壁上
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
七、受精后8天,胚芽完成“着陆”,微微嵌入子宫内膜,此时它分裂发育为几百个细胞。
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
(screen.width*0.8-70)) this.width=(screen.width*0.8-70)'>
![1.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F1.jpg&hash=c5a05e9af2cfb0b565bd0fa644d09ebe)
二、但是只有一个精子可能穿过重重障碍,使卵子受精,最终制造出一个胚胎。
![2.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F2.jpg&hash=736c63b75a8fbb37fe6e387bd7effbfb)
三、卵子经过大约15厘米长的、狭窄的输卵管向子宫游动,它周围的营养细胞像一串串美丽的光环围绕着它。很快,它将与精子相遇并开始受精的过程。
![3.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F3.jpg&hash=c191e8091731c16890e80ba28c46552f)
四、一个精子试图进入卵子的瞬间
![4.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F4.jpg&hash=99c307476b8de2531727a1e0f7869986)
五、此时精子的头已经钻进去了,我们还可以看到它的中部和尾部,它就像一个不断旋转的钻头,在尾部拍打的驱动下,努力进入卵子。
![5.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F5.jpg&hash=f7b7d5e12747b2fa624dcd18aba09257)
六、第1周,在受精之后几小时之内,受精卵开始分裂。1周以后,这个小圆球将自己附着在子宫壁上
![6.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F6.jpg&hash=1449e484cf454f6ae4c65f93a8410b5c)
七、受精后8天,胚芽完成“着陆”,微微嵌入子宫内膜,此时它分裂发育为几百个细胞。
![7.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F7.jpg&hash=b291d249b21ded816f39ee90f52ebca6)
![8.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F8.jpg&hash=6b7422f58f8151200f05f2e80e5b02aa)
![9.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F9.jpg&hash=e150e927411a7fb9b7a477197574b502)
![10.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F10.jpg&hash=01ab6874d69b0cb2b233d6a0e34b531e)
![11.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F11.jpg&hash=2deb2fc26a4739e6b674c48c32b7c349)
![12.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F12.jpg&hash=a01306f7b62bf1c62ebdc61cf9f2e815)
![13.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F13.jpg&hash=4790044d089f827c3cb032164e45ef44)
![14.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F14.jpg&hash=d5184383156154fefed3071758223232)
![15.jpg](/proxy.php?image=http%3A%2F%2Fnews.tom.com%2Fimages%2Fpiclib%2Fls%2F0603011%2F15.jpg&hash=1f0dcf2c56de6b2fafd30cec4a30f524)