2022
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
2019
Relationship between patient characteristics and serum etonogestrel concentrations in contraceptive implant users
Lazorwitz A, Aquilante C, Sheeder J, Guiahi M, Teal S. Relationship between patient characteristics and serum etonogestrel concentrations in contraceptive implant users. Contraception 2019, 100: 37-41. PMID: 30980827, PMCID: PMC6589369, DOI: 10.1016/j.contraception.2019.03.045.Peer-Reviewed Original ResearchConceptsSerum etonogestrel concentrationsContraceptive implant usersBody mass indexBlack/African American raceEtonogestrel concentrationsAfrican American raceMass indexPatient characteristicsImplant useEtonogestrel levelsImplant usersAmerican raceHispanic/Latina ethnicityMedian body mass indexSerum etonogestrel levelsEtonogestrel contraceptive implantSide effect profileReproductive-age womenCertain patient characteristicsIndividual patient characteristicsMajority of womenNon-significant increaseLatina ethnicityMedian ageSerum concentrations