Without any available cohortstudies to test exposure over a long period of time, though, they have had to rely on lab studies, which failed to find any clear or reproducible biological effects.
A systematic search for randomized controlled trials and prospective cohortstudies comparing home-based and clinic-based medical abortion was conducted.
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。
3
Prospective cohortstudies have shown no differences in effectiveness or acceptability between home-based and clinic-based medical abortion across countries.