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nt值多少范围内正常范围

更新时间: 2020-11-04 00:00:00     

nt值小于2.5mm时判断为正常,当胎儿NT值大于或等于2.5毫米时,可判断为颈项透明层增厚。颈项透明层增厚越明显,胎儿异常机会就越高,异常程度也越严重。胎儿nt值的检查报告是没有办法看出胎儿性别的,nt是对于胎儿颈部透明层的一项筛查,对于胎儿是不是存在先天性神经管畸形的情况是一个最早的排查检查。

关键词: nt 多少 范围 正常

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