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28周 羊水正常是多少

更新时间: 2020-11-04 00:00:00     

怀孕28周时的羊水量深度在3-7cm之间、羊水指数在8-18cm都是正常的。

充满于羊膜腔内的液体称为羊水。羊水的来源、量和成分随孕周不同而有所变化。妊娠初期,羊水主要是母体血清通过胎盘进入羊膜腔的透析液,少量从胎盘表面和脐带表面渗出。

关键词: 羊水 正常 多少

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