Objective: (1) To explore a technological system suitable for the Down 's syndrome prenatal screening in Yunnan province, using maternal serum markers.
目的：(1)用孕妇血清标记物进行唐氏综合征产前筛查，探索适合云南省实际情况的产前筛查技术体系。
Objective: (1) To explore a technological system suitable for the Down 's syndrome prenatal screening in Yunnan province, using maternal serum markers.
目的：(1)用孕妇血清标记物进行唐氏综合征产前筛查，探索适合云南省实际情况的产前筛查技术体系。
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