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qi miao wu bi de ren zhi chu : jing luan jie he
Pages: 27-28
Year: Issue:  6
Journal:  Health Life

Keyword:  GetLinkList(KeywordFilter('精子:5703输卵管壶腹部:4452卵子:4025胚囊:2628子宫腔:2429阴道内:2214子宫颈:2162子宫内膜:1816女性:1742发育:1646')'kw''CJFQ');
Abstract: <正>性交时,男性将射出的精液输送到女性的阴道,许多人认为,女性就可怀孕了。其实,这只是漫长的路程中第一步。精子与卵子结合,从胚囊到最后发育成人,还有一段很长的艰难历程,不信?请看——
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