ProgesteroneReceptors, ProgesteroneEstradiolCorpus LuteumEstrusLuteinizing HormonePregnancyReceptors, EstrogenMifepristoneProgestinsProgesterone CongenersPromegestoneNorpregnadienesBreast NeoplasmsGonanesHormone AntagonistsUterusOviductsEndometriumOvariectomyEstrogensLuteal PhasePregnancy, AnimalMenstrual CycleImmunohistochemistryOvaryOvulationEstrogen Receptor alphaMyometriumReceptors, EstradiolHydroxyprogesteronesReceptor, erbB-2Luteal CellsGranulosa CellsChorionic GonadotropinDinoprostPseudopregnancyMedroxyprogesterone AcetateCastrationTamoxifenGonadal Steroid Hormones20-alpha-DihydroprogesteroneSteroidsFollicle Stimulating HormoneUterine NeoplasmsOvarian FollicleEstrous CycleMedroxyprogesteroneRNA, MessengerEstrenesCarcinoma, Ductal, BreastFollicular PhaseProgesterone-Binding GlobulinSheepLuteolysisProlactinEstrogen Receptor betaTumor Markers, BiologicalKi-67 Antigen20-Hydroxysteroid DehydrogenasesLeiomyomaMenstruation3-Hydroxysteroid DehydrogenasesEmbryo ImplantationOxytocinChickensNorethindroneMammary Glands, AnimalEndometrial NeoplasmsDiestrusEstrogen AntagonistsLabor, ObstetricPregnanolonePregnenedionesGonadotropin-Releasing HormoneRadioimmunoassayCattleDeciduaPregnancy MaintenanceAdministration, IntravaginalPregnenoloneCytosolTestosteroneProestrusTime FactorsPregnanedionesReceptors, SteroidReceptors, GlucocorticoidEstroneContraceptive Agents, FemaleHormonesPrognosisAndrostenedione5-alpha-DihydroprogesteroneImmunoenzyme TechniquesReceptors, AndrogenReverse Transcriptase Polymerase Chain ReactionNeoplasms, Hormone-DependentBreastReceptors, Oxytocin