“二孩”政策以来中国北方某三甲医院高龄产妇及产次变化情况分析
吴博浩, 金楚瑶, 王慧英, 李楠, 李智文
Secular trends of advanced maternal age and the number of births in a tertiary-level hospital in Beijing since the implementation of two-child policy
WU Bohao, JIN Chuyao, WANG Huiying, LI Nan, LI Zhiwen
中国生育健康杂志
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2018, (3): 201
-204
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