UterusGenitalia, FemalePregnancyPregnancy, AnimalEmbryo ImplantationUterine ContractionOvariectomyEstradiolMyometriumCervix UteriProgesteroneEndometriumUterine DiseasesUterine NeoplasmsSex CharacteristicsDeciduaSexual Behavior, AnimalEstrusPseudopregnancyEstrous CycleOvaryReproductionSex FactorsEstrogensVaginaFallopian TubesFertilityInfertility, FemaleCastrationHysterectomyOrgan SizeOxytocinCopulationRNA, MessengerCondoms, FemalePlacentaLabor, ObstetricDiethylstilbestrolTime FactorsEmbryo Implantation, DelayedMullerian DuctsImmunohistochemistrySexual MaturationRats, Sprague-DawleyBlastocystIn Situ HybridizationUterine RuptureSheepBody WeightMating Preference, AnimalMice, Inbred StrainsProstaglandins FAge FactorsReceptors, EstrogenDiestrusSperm TransportEstrogen Receptor alphaMetrial GlandViviparity, NonmammalianDinoprostGonadal Steroid HormonesSex RatioOvipositionOviductsMenstrual CycleLitter SizeEstrogen AntagonistsPostpartum PeriodRelaxinRats, Inbred StrainsReceptors, OxytocinPregnancy ProteinsEmbryo TransferFetusEpitheliumNafoxidineTrophoblastsOvulationPlacentationGestational AgeEstrogens, Non-SteroidalOvum TransportReceptors, ProgesteroneTissue DistributionGenitaliaEndometrial HyperplasiaGene ExpressionMice, Inbred C57BLEndometriosisGene Expression RegulationAdnexa UteriTestosteroneAnimals, NewbornReverse Transcriptase Polymerase Chain ReactionRisk FactorsAnalysis of VarianceAgingPregnancy MaintenanceEmbryonic DevelopmentSwine