设计：前瞻随机研究。场所：生育中心。
DESIGN: Prospective randomized study. SETTING: Fertility center.
这项前瞻性研究包括了在哈南省随机选择的社区卫生站中登记的孕妇。
This prospective study included pregnant women registered in health stations in randomly-selected communes in Ha Nam province.
对比较在家里或在诊所进行药物流产的随机对照试验和前瞻性群组研究进行系统搜索。
A systematic search for randomized controlled trials and prospective cohort studies comparing home-based and clinic-based medical abortion was conducted.
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