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唐氏筛查downs 多少算正常

更新时间: 2020-11-04 00:00:00     

唐氏筛查中唐氏综合征的风险率通常低于1:250,高于1:250是高风险。

我国活产儿唐氏综合征的发病率约为0.5‰-0.6‰,男女比例为3:2,60%名婴儿将在胎儿早期流产。染色体疾病包括唐氏综合征、18三体综合征和神经管畸形。

关键词: downs 多少 正常

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