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人怎样繁衍后代

更新时间: 2020-09-15 00:00:00     

人类通过有性繁殖,繁衍后代。也就是说,通过性交,精子与卵子融合,形成受精卵,并通过受精卵的自主移动经过两至三天到达子宫开始着床发育,形成原始胚胎,再经过进一步发育,280天左右就可以分娩形成后代。

关键词: 怎样 繁衍 后代

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