天气预报 > 其他 > nt头臀径值是多少正常
nt头臀径值是多少正常
更新时间: 2020-11-04 00:00:00  

nt小于2.5毫米为正常,大于或者小于这个数值就要留心一下了,nt只是初步筛查染色体异常,怀孕15到20周需要做唐氏筛查或者是无创DNA。按时去检查,怀孕中期请适当增加奶蛋禽鱼瘦肉等的摄入,必要时增加钙剂和铁剂。

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