ProgestinsProgesterone CongenersMedroxyprogesterone AcetateEstradiolPromegestoneMifepristoneNorpregnadienesNorethindroneMedroxyprogesteroneEstrogensEstrogen Replacement TherapyCorpus LuteumNorgestrelHydroxyprogesteronesEstrusReceptors, ProgesteroneNorprogesteronesEndometrium20-alpha-DihydroprogesteroneLevonorgestrelUterusPregnancyOvariectomyPregnenedionesEstrogens, Conjugated (USP)Luteinizing HormoneReceptors, EstrogenOvulationHormone AntagonistsProgesterone5-alpha-DihydroprogesteroneOvaryLuteal PhasePregnancy, AnimalDesogestrelMenstrual CycleContraceptives, Oral, Synthetic20-Hydroxysteroid DehydrogenasesNorpregnenesGonanesBreast NeoplasmsSteroidsDinoprostLuteal CellsContraceptive Agents, FemaleGranulosa CellsDydrogesteronePregnenoloneChorionic GonadotropinFollicle Stimulating HormonePseudopregnancyContraceptives, Oral, CombinedOvarian FollicleGonadal Steroid HormonesHormone Replacement TherapyMegestrolEstrus SynchronizationPregnanoloneDrug ImplantsAdministration, IntravaginalEstrous Cycle3-Hydroxysteroid DehydrogenasesEndometrial HyperplasiaNorethynodrelPregnanedionesIntrauterine Devices, MedicatedCastrationPostmenopause17-alpha-HydroxyprogesteroneFollicular PhaseEthinyl EstradiolMenstruationSheepProlactinLuteolysisPregnanediolContraceptives, Oral, HormonalPregnancy MaintenanceLynestrenolContraceptives, OralMyometriumTestosteroneDiestrusRadioimmunoassayOviductsEndometrial NeoplasmsAndrostenes20-alpha-Hydroxysteroid DehydrogenaseCattleGonadotropin-Releasing HormoneEstronePregnanesMelengestrol AcetateChlormadinone AcetateMenopauseUterine NeoplasmsTime FactorsAndrostenedioneReceptors, EstradiolRNA, Messenger