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21三体综合征正常值是多少
更新时间: 2020-11-05 00:00:00  

唐氏筛查当中的21三体综合症,正常数值是1:270才为合适。唐氏综合征即21-三体综合征,又称先天愚型或Down综合征,是由染色体异常(多了一条21号染色体)而导致的疾病。

关键词: 综合征 正常值 多少

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