ParturitionLabor, ObstetricPregnancy, AnimalPregnancyPostpartum PeriodLactationMyometriumCervical RipeningOxytocinProgesteroneUterine ContractionPlacenta, RetainedLabor, InducedExtraembryonic MembranesUterusReceptors, OxytocinMacropodidaeCattleColostrumRelaxinAmnionMilkDinoprostFlumethasoneDystociaAnimals, SucklingLitter SizePlacentaPubic SymphysisGestational AgeObstetric Labor, PrematureProstaglandins FMammary Glands, AnimalCervix UteriMarsupialiaSheepEstrusOxytocicsAnimals, NewbornLabor OnsetParturient ParesisMaternal BehaviorReproductionCarthamus tinctoriusAmniotic FluidTerm BirthFetusCorpus LuteumMaternal-Fetal ExchangeCattle DiseasesEstradiolArtiodactylaProlactinSwineEstroneParityAnimal Nutritional Physiological PhenomenaTime FactorsChorionRadioimmunoassayBody WeightFetal DeathPinus ponderosaPlant PoisoningOvaryGoatsPinnipediaPuerperal InfectionRandom AllocationObstetric Labor ComplicationsCell Nucleus ShapeEndometritisLabor Stage, First20-alpha-DihydroprogesteroneMilk EjectionPregnancy MaintenanceDeciduaWeaningEmbryo Implantation, DelayedAnimal FeedCell Nucleus DivisionThermometryDairyingProstaglandinsEstrous CycleRitodrineReceptors, ProstaglandinUterine DiseasesHydrocortisoneProstaglandins F, SyntheticMaternal Nutritional Physiological PhenomenaBirth WeightChorioamnionitis20-Hydroxysteroid DehydrogenasesPremature BirthPregnancy ComplicationsCesarean SectionRNA, MessengerAbortion, VeterinaryLuteinizing Hormone