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孕20周的羊水多少正常
更新时间: 2020-11-05 00:00:00  

怀孕20周正常的羊水约400mL。羊水可以对胎儿起到保护作用,可以缓解外来的压力和暴力冲击,也有利于胎儿的自由活动。在分娩的时候,可以起到润滑产道的作用。羊水过多或者过少,都有重要的临床意义。羊水过多见于胎儿畸形,以中枢系统和消化系统畸形最为常见,或者见于多胎妊娠、胎盘脐带病变、母儿血型不合。羊水过少对怀孕也是不利的。

关键词: 羊水 多少 正常

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