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13周胎儿标准是多少
更新时间: 2020-11-05 00:00:00  

13周胎儿的头臀径标准一般是在6.5厘米左右,正常的双顶径的平均值是2.4。

在妊娠的11到13周6天之间进行的NT彩超检查,主要的目的就是测量胎儿颈部透明带的厚度。

关键词: 胎儿 标准 多少

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