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怀孕多少天孕囊进入子宫
更新时间: 2020-11-05 00:00:00  

一般受精5-7天受精卵就在子宫着床,孕五周B超检查可以看到孕囊。

孕囊是原始的胎盘组织,被羊膜、血管网包裹的小胚胎。孕囊是怀孕最初的形态,那时候胎儿还没有形成,胎芽出现时已经有胎心跳动了。

关键词: 怀孕 多少 进入 子宫

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