OxytocinLabor, ObstetricLabor, InducedLabor OnsetLabor PainObstetric Labor, PrematureOxytocicsObstetric Labor ComplicationsTrial of LaborPregnancyVasotocinMyometriumUterine ContractionLabor Stage, ThirdLabor PresentationVasopressinsMilk EjectionDelivery, ObstetricCesarean SectionSupraoptic NucleusTocolytic AgentsNeurophysinsPituitary Gland, PosteriorDinoprostUterusParturitionAnalgesia, EpiduralAmnionCervical RipeningOrnipressinPostpartum HemorrhageProgesteroneTerm BirthPregnancy, ProlongedAnesthesia, ObstetricalFetal MonitoringParaventricular Hypothalamic NucleusPregnancy, AnimalUterine InertiaExtraembryonic MembranesLactationChorioamnionitisPregnancy OutcomeParityGestational AgeCervix UteriFetal Membranes, Premature RuptureEstrusAmniotic FluidDystociaSocial BehaviorSheepCorpus LuteumHypothalamusApgar ScoreMaternal BehaviorHormone AntagonistsLuteolysisUterine MonitoringTocolysisPair BondUterine RuptureMisoprostolVaginal Birth after CesareanEndometriumProstaglandins FPregnancy Trimester, ThirdInfant, NewbornLypressinPregnancy ComplicationsChorionEmploymentMeperidinePostpartum PeriodTime FactorsNatural ChildbirthRadioimmunoassayPlacentaMidwifery