阿颈背扫描是扫描超声产前筛查(超声波)，以帮助确定风险较高的唐氏综合征胎儿中，特别是对老年妇女有较高的风险，谁这样怀孕。
A nuchal scan is a sonographic prenatal screening scan (ultrasound) to help identify higher risks of Down syndrome in a fetus, particularly for older women who have higher risks of such pregnancies.
目的调查两种孕中期唐氏综合征产前筛查方法的一致性。
Objective:To investigate the consistency between two maternal serum screening for Down′s syndrome in the second trimester pregnancy.
目的调查两种孕中期唐氏综合征产前筛查方法的一致性。
Objective:To investigate the consistency between two maternal serum screening for Down′s syndrome in the second trimester pregnancy.
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