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孕期27周羊水多少正常
更新时间: 2020-11-04 00:00:00  

孕期27周羊水3至8厘米之间正常,超过正常值是羊水过多,低于正常值是羊水过少。

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: 孕期 羊水 多少 正常

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