Methods: To compare analgesia effectiveness and painless time, side-effect and Apgar score for two spinal anesthesia protocols, bupivacaine 0.5% 9mg + sufentanil 2.5mcg + morphine 0.1mg (group A) and bupivacaine 0.5% 9mg + sufentanil 2.5mcg (group B) in cesarean section.