研究设计：前瞻性随机对照研究。

Design: This is a prospective randomized study.

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据我们所知，这两种方法还没有进行过前瞻性随机对照研究。

To our knowledge, no prospective randomized trial has compared the two techniques.

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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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