Anesthesia, SpinalCesarean SectionAnesthesia, ObstetricalAnesthesia, EpiduralBupivacainePregnancyEphedrineAnesthesia, GeneralAnesthetics, LocalDelivery, ObstetricSpinal CordHypotensionSurgical Procedures, ElectiveOxytocicsApgar ScoreAdjuvants, AnesthesiaAnesthesiaBreech PresentationLabor, ObstetricInjections, SpinalAnesthesia, LocalAnalgesia, ObstetricalAnesthesia, ConductionPostoperative Nausea and VomitingInfant, NewbornCesarean Section, RepeatPlasma SubstitutesObstetric Labor ComplicationsAnesthesia Recovery PeriodDouble-Blind MethodPain, PostoperativeSpinal Cord InjuriesPregnancy Complications, CardiovascularLidocaineIsotonic SolutionsAnesthesia, InhalationAnesthesia, IntravenousTetracaineFetal BloodPregnancy OutcomeAnalgesics, OpioidSimethiconeOxytocinProspective StudiesAmidesSpecific GravityParturitionMaternal-Fetal ExchangeAnesthetics, CombinedNerve BlockMepivacaineExtraembryonic MembranesAmbulatory Surgical ProceduresFentanylFetal DistressGestational AgePregnancy ComplicationsPrilocaineVaginal Birth after CesareanTrial of LaborAmnionIntraoperative ComplicationsMonitoring, IntraoperativeSurgical Procedures, MinorSensationLabor, InducedAnesthetics, IntravenousBlood Loss, SurgicalPropofolAmniotic FluidSufentanilInfectious Disease Transmission, VerticalPregnancy Trimester, ThirdAnesthesia, DentalPost-Dural Puncture HeadacheCarticaineDystociaSpinal PunctureMyometriumShiveringSpinal Nerve RootsPregnancy Complications, InfectiousHydroxyethyl Starch DerivativesPreanesthetic MedicationUterine RuptureDeciduaAnesthetics, InhalationHernia, InguinalConscious SedationFemoral NervePain MeasurementAnestheticsSpinal NervesPlacentaAnalgesia, EpiduralSubarachnoid SpaceMorphineSpinal Cord DiseasesIsofluraneParity