Mifepristone (RU 486) — An Abortifacient to Prevent Abortion?

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Abstract
Although the use of postcoital or emergency contraception dates back at least two millennia,1 practical methods did not evolve until the 1960s, when large doses of estrogen given soon after unprotected intercourse or a contraceptive failure (such as a torn condom) were found to prevent pregnancy.2 Two decades later, postcoital contraception remains underused, because many women — and health care professionals — are unaware of its availability. College-student health services have been the most visible providers, although affiliates of the Planned Parenthood Federation of America and some private physicians also offer postcoital contraception. To date, no sponsor has requested approval . . .