between prostaglandin administration and expulsion in second trimester abortion. British Journal of Obstetrics and Gynaecology 97:41–45, 1990.
Stiemer, B., and Elger, W. Cervical ripening of the rat in dependence of endocrine milieu: Effects of antigestagens. Journal of Perinatal Medicine (Berlin) 18:419–429, 1990.
Thong, K.J., and Baird, D.T. A study of gemeprost alone, Dilapan or mifepristone in combination with gemeprost for the termination of second trimester pregnancy. Contraception 46:11–17, 1992.
Ulmann, A., Teutsch, G., and Philibert, D. RU 486. Scientific American 262:42–48, 1990.
Urquhart, D.R., Bahzad, C., and Templeton, A.A. Efficacy of the antiprogestin mifepristone (RU 486) prior to prostaglandin termination in pregnancy. Human Reproduction 4:202–203, 1989.
Wolf, J.P., Sinosich, M., Anderson, T.L., et al. Progesterone antagonist (RU 486) for cervical dilation, labor induction and delivery in monkeys: Effectiveness in combination with oxytocin. American Journal of Obstetrics and Gynecology 160:45–47, 1989.
World Health Organization (WHO). The use of mifepristone (RU 486) for cervical preparation in first trimester pregnancy termination by vacuum aspiration. British Journal of Obstetrics and Gynaecology 97:260–266, 1990.