Ethinyl EstradiolContraceptives, Oral, HormonalEstradiolContraceptives, Oral, CombinedContraceptive Agents, FemaleDesogestrelEstradiol CongenersContraceptives, OralContraceptive Devices, FemaleLevonorgestrelContraceptive AgentsContraceptives, Oral, SyntheticCyproterone AcetateEthinyl Estradiol-Norgestrel CombinationContraceptive Agents, MaleNorgestrelContraceptionMedroxyprogesterone AcetateAndrostenesSpermatogenesis-Blocking AgentsProgestinsNorpregnenesEstrogensContraception BehaviorNorprogesteronesPregnancy, UnplannedTransdermal PatchNorethindroneTranssexualismContraceptives, Postcoital, HormonalHirsutismContraceptive DevicesLactobacillus fermentumAcne VulgarisBenzhydryl CompoundsAfrica, SouthernMenstrual CycleDiethylstilbestrolAfrica, EasternFollicular PhaseIntrauterine DevicesFamily Planning ServicesPregnancyPhenolsTestosteroneAndrogen AntagonistsReceptors, EstradiolContraceptives, PostcoitalSexual BehaviorMestranolCervix UteriHIV SeropositivitySpermatogenesisVaccines, ContraceptiveEthisteroneRisk FactorsDose-Response Relationship, DrugLiverSterilization, Reproductive