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孕12周b超nt值通常是多少
更新时间: 2020-11-04 00:00:00  

NT检查怀孕早期排畸检查,又称胎儿颈部透明度检查,一般NT检查数值小于2.5mm属于正常情况,如果大于2.5mm,则有可能是畸形儿,并结合糖筛的血清抽查决定是否需要做羊水穿刺,以判定胎儿是否是唐氏儿。

关键词: nt 通常 多少

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