Intrathecal Morphine vs Transversalis Fascia Plane Block After Cesarean Delivery

Inclusion Criteria: * Female parturients aged 18 to 45 years * Gestational age greater than 37 weeks * American Society of Anesthesiologists (ASA) physical status II * Scheduled for elective cesarean delivery under spinal anesthesia * Willingness to participate in the study Exclusion Criteria: * Refusal to participate in the study * Cesarean delivery performed under general anesthesia * Conversion to general anesthesia after spinal anesthesia * ASA physical status greater than III * Multiple pregnancy * Contraindications to central or peripheral regional anesthesia techniques * Body mass index (BMI) greater than 35 kg/m² * Known allergy or hypersensitivity to local anesthetics or opioids * Presence of significant organ dysfunction (e.g., severe hepatic or renal disease)