WalesOnionsLabor, ObstetricLabor, InducedLabor OnsetLabor PainEcotypeObstetric Labor, PrematureDog DiseasesAmyl NitriteDietary SucroseObstetric Labor ComplicationsTrial of LaborSheepCyclic Nucleotide Phosphodiesterases, Type 6EnglandPregnancyDogsLabor PresentationLabor Stage, ThirdDelivery, ObstetricAtrophyCesarean SectionOxytocicsMyometriumAnalgesia, EpiduralUterine ContractionTerm BirthTocolytic AgentsCervical RipeningAmnionParturitionFetal MonitoringExtraembryonic MembranesPregnancy, ProlongedChorioamnionitisFetal Membranes, Premature RuptureAmniotic FluidPregnancy OutcomeParityUterine MonitoringAnesthesia, ObstetricalGestational AgeCervix UteriVaginal Birth after CesareanApgar ScorePostpartum HemorrhageEmploymentDystociaTocolysisUterine RuptureInfant, NewbornPregnancy Trimester, ThirdNatural ChildbirthMidwiferyPregnancy ComplicationsMeperidineChorionBupivacainePelvimetryObstetric NursingSufentanilAnesthesia, EpiduralPlacentaCervical Length MeasurementUterusReceptors, OxytocinPregnancy Complications, InfectiousHospitals, MaternityPremature BirthFetal DistressUterine InertiaPerineumEpisiotomyRitodrineFetal DeathObstetricsCesarean Section, RepeatHeart Rate, FetalMisoprostolAmniocentesisUnemploymentObstetrics and Gynecology Department, HospitalPrenatal CareDeciduaAnesthetics, LocalUltrasonography, PrenatalGravidityBetamethasonePostpartum PeriodVacuum Extraction, ObstetricalPerinatal CareAnalgesics, OpioidTime FactorsButylscopolammonium BromidePuerperal DisordersNurse MidwivesAccidents, OccupationalProspective StudiesHome Childbirth