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Cesarean SectionAnesthesia, ObstetricalAnesthesia, SpinalCesarean Section, RepeatEphedrinePregnancySurgical Procedures, ElectiveDelivery, ObstetricOxytocicsBupivacaineHypotensionInfant, NewbornGestational AgeAnesthetics, LocalTrial of LaborVaginal Birth after CesareanLabor, InducedObstetric Labor ComplicationsPregnancy OutcomeUterine RuptureLabor Stage, FirstProspective StudiesBreech PresentationDrug Delivery SystemsEndometritisAnalgesia, ObstetricalPuerperal InfectionParityApgar ScoreTerm BirthPregnancy ComplicationsLabor, ObstetricPelvimetryLabor PresentationUterine InertiaHysterotomyPlacenta AccretaDystociaExtraction, ObstetricalPregnancy, TwinPostpartum HemorrhageCicatrixBirth InjuriesLabor Stage, SecondObstetricsAnalgesia, EpiduralHospitals, RuralAnesthesia, EpiduralMaternal AgeFetal DistressCervical RipeningInfant, Newborn, DiseasesBirth RateNatural ChildbirthCardiotocographyObstetrics and Gynecology Department, HospitalFetal MacrosomiaPrenatal CareMeperidineGravidityPostpartum PeriodParturitionPremature BirthCephalopelvic DisproportionVersion, FetalBirth CertificatesPregnancy Trimester, ThirdRetrospective StudiesHeart Rate, FetalUterine HemorrhageFetal MonitoringPregnancy, High-RiskPlacenta PreviaPerinatal MortalityInfant MortalityUltrasonography, PrenatalDermatologic Surgical ProceduresMaternal MortalityFetal DeathInfusions, SpinalAnalgesics, OpioidPuerperal DisordersHydromorphonePregnancy Complications, CardiovascularLogistic ModelsUnited StatesRisk FactorsFentanylAnesthesia, ConductionDrug CarriersDiabetes, GestationalLabor OnsetNational Institute of Child Health and Human Development (U.S.)Ethics, ClinicalObstetric Labor, PrematureState Health Planning and Development AgenciesHospitals, VoluntaryPre-EclampsiaBirth WeightPregnancy in Diabetics