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怀孕20周nf的正常值是多少
更新时间: 2020-11-04 00:00:00  

怀孕20周nf的正常值是小于6毫米,如果超过6毫米,应做羊水穿刺检查胎儿染色体核型分析。

nf是检查胎儿颈项透明层厚度,以判断早期染色体疾病和其他胎儿发育异常的情况。一般nf检查通过之后,医生还会建议做唐筛的检查。

关键词: 怀孕 nf 正常值 多少

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