van Santen M R, Haspels A A
Contraception. 1987 May;35(5):433-8. doi: 10.1016/0010-7824(87)90079-5.
The new antiprogestin mifepristone (RU 486) was studied as a contragestive for continuous fertility control in 24 menstrual cycles. Two pregnancies out of three conceptions continued in spite of antiprogestin treatment. To date, mifepristone at the doses used appears to be inadequate for monthly use.
新型抗孕激素米非司酮（RU 486）作为一种用于持续控制生育的避孕药，在24个月经周期中进行了研究。尽管使用了抗孕激素治疗，但三个妊娠中有两个继续发展。迄今为止，所用剂量的米非司酮似乎不足以每月使用。
