Anesthesia, Closed-CircuitAnalgesiaAnalgesia, EpiduralAnesthesia, GeneralAnesthesiaAnalgesia, ObstetricalAnesthesia, LocalAnesthesia, EpiduralAnesthesia, SpinalAnalgesia, Patient-ControlledAnesthesia, ConductionAnesthesia, InhalationAnesthesia, IntravenousAnesthesia, ObstetricalAnalgesics, OpioidPain, PostoperativeAnesthetics, LocalBupivacaineAnesthesia Recovery PeriodFentanylPain MeasurementAnesthesia, DentalMorphineAdjuvants, AnesthesiaAnesthetics, IntravenousNerve BlockAnesthetics, InhalationPropofolAnesthetics, CombinedAcupuncture AnalgesiaAnalgesicsLidocaineNitrous OxideMethyl EthersSufentanilAnesthesiologyIsofluraneMeperidinePainKetamineAnestheticsAnesthesia, CaudalMonitoring, IntraoperativeLabor PainConscious SedationCesarean SectionDouble-Blind MethodInjections, SpinalAmbulatory Surgical ProceduresHalothanePostoperative Nausea and VomitingPreanesthetic MedicationAmidesAnesthesia and AnalgesiaLabor, ObstetricAnesthetics, DissociativeTramadolHypnotics and SedativesAlfentanilMepivacaineAnesthetics, GeneralThiopentalAnalgesics, Non-NarcoticPrilocaineProspective StudiesNerve NetAnesthesia Department, HospitalNaloxoneXylazinePentobarbitalTime FactorsIntubation, IntratrachealPain ThresholdEnfluraneNeural PathwaysIntraoperative PeriodPregnancy