UterusUterine ContractionEmbryo ImplantationPregnancyPregnancy, AnimalMyometriumCervix UteriEndometriumUterine DiseasesDeciduaEstradiolUterine NeoplasmsProgesteroneOvariectomyPseudopregnancyEstrusFallopian TubesGenitalia, FemaleHysterectomyEstrous CycleOxytocinVaginaLabor, ObstetricMullerian DuctsPlacentaOvaryEstrogensEmbryo Implantation, DelayedCastrationUterine RuptureDiethylstilbestrolRNA, MessengerBlastocystIn Situ HybridizationProstaglandins FMetrial GlandDinoprostImmunohistochemistrySheepOrgan SizePregnancy ProteinsRelaxinViviparity, NonmammalianNafoxidineReceptors, EstrogenTrophoblastsSperm TransportReceptors, OxytocinEpitheliumPlacentationPostpartum PeriodOvum TransportEstrogen AntagonistsEmbryo TransferAdnexa UteriDiestrusEndometrial HyperplasiaOviductsEstrogen Receptor alphaEndometriosisPregnancy Maintenance