EstradiolCorpus LuteumProgesterone CongenersMifepristoneProgestinsEstrusLuteinizing HormonePregnancyUterusOvariectomyLuteal PhasePregnancy, AnimalOvulationReceptors, EstrogenEndometriumOvaryHormone AntagonistsEstrogensDinoprostMenstrual CycleHydroxyprogesteronesLuteal CellsPseudopregnancyChorionic GonadotropinFollicle Stimulating HormoneGranulosa CellsGonanes20-alpha-DihydroprogesteroneGonadal Steroid HormonesOvarian FollicleSteroidsNorpregnadienesOviductsCattleSheepEstrous CycleFollicular PhaseLuteolysisCastrationBreast NeoplasmsStructure-Activity RelationshipPregnenoloneMolecular StructureAdministration, Intravaginal20-Hydroxysteroid DehydrogenasesRadioimmunoassayProlactinMyometriumOxytocin3-Hydroxysteroid DehydrogenasesAndrostenedioneTestosteroneGonadotropin-Releasing Hormone5-alpha-DihydroprogesteroneDose-Response Relationship, DrugDiestrusPregnancy MaintenanceTime FactorsPregnanoloneProgesterone-Binding GlobulinCells, CulturedRNA, MessengerKineticsMedroxyprogesteroneProgesterone ReductaseEmbryo ImplantationEstroneProstaglandins FMenstruationAnestrusMedroxyprogesterone AcetateImmunohistochemistryProestrusEstrus SynchronizationLabor, ObstetricPregnanediolPregnanedionesCorpus Luteum MaintenanceHormonesCholesterol Side-Chain Cleavage EnzymePostpartum PeriodMagnetic Resonance SpectroscopyMolecular Sequence DataPregnanesGonadotropins, EquineSwine17-alpha-HydroxyprogesteroneFollicular FluidReceptors, EstradiolInsemination, ArtificialDydrogesteroneDeciduaReceptors, OxytocinStereoisomerismDrug ImplantsPregnancy TestsNorethindroneEstrogen Receptor alphaOvulation InductionSexual Maturation