P079Etonogestrel contraceptive implant users can experience breakthrough ovulation with only two weeks of exposure to a strong cyp3a inducer
Lazorwitz A, Teal S, Sheeder J. P079Etonogestrel contraceptive implant users can experience breakthrough ovulation with only two weeks of exposure to a strong cyp3a inducer. Contraception 2022, 116: 92. DOI: 10.1016/j.contraception.2022.09.103.Peer-Reviewed Original ResearchStrong CYP3A inducersBreakthrough ovulationCYP3A inducersE2 concentrationsP4 concentrationsMedian ageOvulation suppressionImplant usersPg/Baseline serum concentrationsContraceptive implant usersEtonogestrel implant usersSerum E2 concentrationsParticipants' median ageSerum P4 concentrationsENG implant usersDrug-drug interactionsRifampin exposureMedian durationENG implantMedian BMIEndogenous estradiolSerum concentrationsSurrogate biomarkerWeeks of exposure