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孕周和羊水指数是多少正常
更新时间: 2020-11-05 00:00:00  

羊水指数,是衡量胎儿是否健康的一个重要指标。不同的孕周,羊水指数所对应的范围也是不同的。妊娠早期羊水的来源主要是母体血清经胎膜进入羊毛腔的透析液;妊娠中期后,羊水的主要来源是胎儿的尿液。妊娠12周,羊水指数是7.87厘米;妊娠16周,羊水指数是10.5厘米;妊娠20周,羊水指数是12.4~14.7厘米;妊娠24周,羊水指数是14.3~15.9厘米;妊娠28周,羊水指数是15.2~17厘米;妊娠32周,羊水指数是15~16厘米;妊娠36~40周,羊水指数是15.6~14.6厘米。

关键词: 羊水 指数 多少 正常

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