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到生时羊水mm多少正常
更新时间: 2020-11-05 00:00:00  

正常妊娠时,羊水量范围为500~2000ml.存在羊膜腔内,环绕胎儿周围,呈无回声.孕35周后,羊水内存在颗粒状回声或细短光带.测量时可取羊水最大深度测量,也可分取四个象限羊水深度相加获得羊水指数.羊水池深度正常范围为3.0~8.0cm.羊水指数正常范围为5.0~20.0cm.目前后者常用.

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