Analgesia, EpiduralPain, PostoperativeAnalgesia, ObstetricalAnalgesiaAnalgesia, Patient-ControlledAnesthesia, EpiduralBupivacaineLabor PainLabor, ObstetricAnalgesics, OpioidAnesthetics, LocalAnesthesia, ObstetricalFentanylSufentanilPain MeasurementLabor Stage, FirstAmidesCesarean SectionMeperidineObstetric Labor ComplicationsMorphinePregnancyNerve BlockDelivery, ObstetricLabor Stage, SecondPostoperative Nausea and VomitingThoracotomyExtraction, ObstetricalAnesthesia, GeneralDouble-Blind MethodHydromorphoneAnalgesicsApgar ScoreAnesthesia, SpinalHeart Rate, FetalNalbuphineDystociaLidocaineUrinary RetentionPuerperal DisordersMepivacaineInjections, SpinalLacerationsPainParityPerineumAcupuncture AnalgesiaPostoperative CareProspective StudiesFemoral NerveEpisiotomyObstetrical ForcepsThoracic Surgical ProceduresHematoma, Epidural, SpinalPerioperative CareObstetrics and Gynecology Department, HospitalPruritusAbdomen