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唐氏筛查比例是多少算正常

更新时间: 2020-11-04 00:00:00     

唐氏筛查比例是1/275算正常。大于为高危,小于则为低危。唐氏综合症又叫做21三体,是说患者的第21对染色体比正常人多出一条(正常人为一对)唐氏筛查是通过孕妇血清中AFP和HCG的含量,结合孕妇的年龄,体重,孕周计算的风险值。

关键词: 比例 多少 正常

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