Anesthesia technique will be standardized for all women. A loading epidural dose of 20 ml of 0.25% bupivacaine with 2 μg/ml of fentanyl will be administered in divided 5 ml top-up doses. Epidural catheterization and anesthesia will be done by the attending anesthesiologists who will not be involved in the postoperative assessment of the patient and who is unaware of the patient's group.