4224例高龄孕妇胎儿染色体细胞遗传学分析

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马丽爽徐建扬王方娜李亚丽*

Cytogenetic analysis of fetal chromosome distribution of 4224 elderly pregnant women

MA Lishuang, XU Jianyang, WANG Fangna, LI Yali

中国计划生育学杂志 . 2020, (10): 1596 -1600 .