中国计划生育学杂志
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上海市某区产后1年内人工流产妇女意外妊娠原因调查分析
上海市闵行区妇幼保健院(201102)
Survey of the causes of unwanted pregnancy among women with abortion within postpartum 1 year in a district of Shanghai
Minhang District Maternal and Child Health Care Hospital, Shanghai, 201102