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怀孕20周正常羊水多少
更新时间: 2020-11-04 00:00:00  

怀孕20周正常羊水量一般是500~2000ml。不同的孕期羊水多少也是不同的。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: 怀孕 正常 羊水 多少

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