ProgesteroneProgestinsProgesterone CongenersEstradiolHormonesLuteinizing HormoneMedroxyprogesterone AcetateFollicle Stimulating HormonePromegestoneEstrogensMifepristoneNorethindroneNorpregnadienesGonadal Steroid HormonesMedroxyprogesteroneThyroid HormonesCorpus LuteumGonadotropin-Releasing HormoneEstrusEstrogen Replacement TherapyHydroxyprogesteronesReceptors, ProgesteroneNorgestrelOvariectomyPregnancyHormone AntagonistsEndometriumUterusNorprogesterones20-alpha-DihydroprogesteroneHormone Replacement TherapyOvaryEstrogens, Conjugated (USP)Receptors, EstrogenLevonorgestrelOvulationPregnenedionesParathyroid HormoneLuteal PhasePregnancy, AnimalMenstrual Cycle5-alpha-DihydroprogesteroneProlactinTestosteroneSteroidsChorionic GonadotropinBreast NeoplasmsAdrenocorticotropic HormoneDesogestrelContraceptives, Oral, SyntheticGranulosa CellsReceptors, Thyroid Hormone20-Hydroxysteroid DehydrogenasesHuman Growth HormonePostmenopauseNorpregnenesGonanesDinoprostCastrationLuteal CellsPregnenoloneRadioimmunoassayPituitary HormonesContraceptive Agents, FemalePseudopregnancyDydrogesteroneContraceptives, Oral, CombinedEstrous CycleDrug ImplantsSheepOvarian FollicleFollicular PhaseRNA, MessengerEstrus Synchronization3-Hydroxysteroid DehydrogenasesMegestrol17-alpha-HydroxyprogesteronePituitary GlandCattleEthinyl EstradiolPregnanoloneMenstruationPregnanediolTime FactorsAdministration, IntravaginalEndometrial HyperplasiaMenopauseNorethynodrelContraceptives, Oral, HormonalPregnanedionesEstroneIntrauterine Devices, MedicatedContraceptives, OralTriiodothyronineDiestrusLuteolysisMyometriumPregnancy MaintenanceAndrostenedioneDose-Response Relationship, Drug