中国计划生育学杂志
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北京市石景山地区人工流产情况及避孕失败相关因素分析
首都医科大学附属北京朝阳医院(100043)
Investigation on the distribution of women with induced abortion in Beijing Shijingshan area and analysis of related factors of contraceptive failure
Beijing Chaoyang Hospital Affiliate to Capital Medical University, Beijing, 100043