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孕七个半月羊水达到多少算正常值
更新时间: 2020-11-05 00:00:00  

孕七个半月羊水正常值是5-18cm。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: 半月 羊水 达到 多少 正常值

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