OxytocinEstrogensReceptors, EstrogenEstrogen Receptor alphaEstrogen Receptor betaEstradiolEstrogens, Conjugated (USP)OxytocicsVasotocinOvariectomyEstrogens, CatecholVasopressinsUterusMilk EjectionSelective Estrogen Receptor ModulatorsSupraoptic NucleusProgesteronePituitary Gland, PosteriorEstrogens, Non-SteroidalNeurophysinsMyometriumUterine ContractionBreast NeoplasmsDinoprostLabor, ObstetricPregnancyTamoxifenOrnipressinEstradiol CongenersAromataseReceptors, ProgesteroneDiethylstilbestrolEstrusParaventricular Hypothalamic NucleusEndometriumHypothalamusEstroneLactationPregnancy, AnimalRNA, MessengerLabor, InducedCorpus LuteumRats, Sprague-DawleyPostmenopauseSheepLuteolysisMaternal BehaviorProgestinsHormone AntagonistsEthinyl EstradiolSocial BehaviorPhytoestrogensPair BondImmunohistochemistryRadioimmunoassayGonadal Steroid HormonesDose-Response Relationship, DrugReceptors, EstradiolTocolytic AgentsOvaryNeoplasms, Hormone-DependentLypressinProstaglandins FHydroxyestronesCastrationPostpartum HemorrhageTime FactorsMammary Glands, AnimalAromatase InhibitorsMenopauseSex CharacteristicsGene Expression RegulationNeuronsVitellogeninsLabor Stage, ThirdUterine InertiaArvicolinaeTestosteroneRats, WistarProlactin