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Nothing is perfect, not even contraception. And sometimes, there’s no contraception to speak of. Preventing pregnancy, however, doesn’t need to be complicated. Copper IUDs and oral agents like ulipristal are effective and relatively easy methods of preventing unintended pregnancy. To help make sense of it all, Jan Schoenberger and Stuart Swadron review the 2015 NEJM article Emergency Contraception.
Raymond, Elizabeth G., and Kelly Cleland. "Emergency Contraception." New England Journal of Medicine 372.14 (2015): 1342-1348.