UterusCervix UteriUterine Cervical NeoplasmsCervical RipeningPregnancyUterine ContractionPregnancy, AnimalMyometriumUterine NeoplasmsCervix MucusHysterectomyEmbryo ImplantationUterine DiseasesUterine Cervical DiseasesProgesteroneEndometriumLabor, ObstetricGenitalia, FemaleVaginaEstradiolOvariectomyUterine Cervical IncompetenceDeciduaCarcinoma, Squamous CellUterine Cervical DysplasiaCervical Intraepithelial NeoplasiaParturitionPseudopregnancyEstrusVaginal NeoplasmsRelaxinVaginal SmearsPapillomaviridaeMullerian DuctsFallopian TubesImmunohistochemistryOxytocinEstrous CyclePapillomavirus InfectionsSperm TransportBrachytherapyEstrogensObstetric Labor, PrematureLabor Stage, FirstCarcinoma in SituDiethylstilbestrolOvaryRNA, MessengerCastrationLabor, InducedPlacentaColposcopyCerclage, CervicalEpitheliumIn Situ HybridizationUterine HemorrhageCarcinoma, AdenosquamousUterine RuptureTumor Virus InfectionsAdenocarcinomaSheepEmbryo Implantation, DelayedProstaglandins FUterine CervicitisUterine Cervical ErosionAdenosarcomaOxytocicsGonanesExtraembryonic MembranesReceptors, OxytocinPelvisGestational AgeCesarean SectionDinoprostPapanicolaou TestPostpartum PeriodHysterosalpingographyTime FactorsOrgan SizePregnancy Trimester, SecondEndometrial NeoplasmsPrecancerous ConditionsLabor OnsetAdministration, IntravaginalBlastocystNeoplasmsReceptors, EstrogenMetrial GlandEmbryo TransferInsemination, ArtificialEndometritisPremature BirthMifepristoneProstaglandinsPessariesReceptors, ProgesteroneMenstrual CycleInfertility, FemaleEstrogen Receptor alphaProgestins