HormonesLuteinizing HormoneEstradiolFollicle Stimulating HormoneThyroid HormonesGonadal Steroid HormonesGonadotropin-Releasing HormoneCorpus LuteumProgesterone CongenersProgestinsMifepristoneEstrusParathyroid HormoneOvariectomyPregnancyHormone AntagonistsUterusOvaryEstrogensLuteal PhaseOvulationReceptors, EstrogenAdrenocorticotropic HormonePregnancy, AnimalProlactinReceptors, Thyroid HormoneEndometriumChorionic GonadotropinHuman Growth HormoneMenstrual CycleTestosteronePituitary HormonesSteroidsHydroxyprogesteronesDinoprostGranulosa CellsRadioimmunoassayLuteal CellsPseudopregnancyCastrationSheepHormone Replacement Therapy20-alpha-DihydroprogesteronePituitary GlandTriiodothyronineFollicular PhaseGonanesEstrous CycleBreast NeoplasmsCattleOviductsRNA, MessengerJuvenile HormonesNorpregnadienesOvarian FollicleAndrostenedioneLuteolysisGonadal HormonesPregnenolone3-Hydroxysteroid DehydrogenasesPituitary Hormone-Releasing HormonesGrowth Hormone-Releasing HormoneTime FactorsEstroneCorticotropin-Releasing HormoneMyometrium20-Hydroxysteroid DehydrogenasesAdministration, IntravaginalMedroxyprogesterone AcetateThyroxineHypothalamic HormonesDiestrusOxytocinMenstruationAnti-Mullerian HormoneMedroxyprogesteroneImmunohistochemistryCells, CulturedProestrusPeptide HormonesDose-Response Relationship, Drug5-alpha-DihydroprogesteronePituitary Hormones, AnteriorAnestrusSexual MaturationPregnanediolThyrotropinEmbryo ImplantationThyroid Hormone Receptors betaHypophysectomyGonadotropins, PituitaryPregnancy MaintenanceProgesterone ReductasePregnanoloneProstaglandins FProgesterone-Binding GlobulinPostpartum PeriodPlacental Hormones17-alpha-HydroxyprogesteroneEstrus Synchronization