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nt值多少范围内正常
更新时间: 2020-11-04 00:00:00  

nt值正常范围是小于2.5mm,大于3mm要警惕胎儿染色体异常或发育异常。nt值是指胎儿颈后皮下组织液内液体积聚的厚度,当颈项透明层大于或等于2.5毫米时,可判断为颈项透明层增厚。

关键词: nt 多少 范围 正常

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