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nt指标一般是多少
更新时间: 2020-11-04 00:00:00  

nt指标一般是0.25CM以下即为正常范围。nt检查是对12周胎儿颈部透明层厚度的监测,筛查早期畸形。建议在11-13周加6天进行NT检查。若胎儿颈部透明层厚度>2.5mm,甚至超过3-3.5mm以上,提示胎儿有畸形的可能,特别是心脏异常或21-三体综合征的发生,建议后续进行无创DNA检查或羊水穿刺,来明确胎儿是否畸形。

关键词: nt 指标 一般 多少

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