Influence of Patient Choice of Intrathecal Morphine on Post-cesarean Delivery Pain.

This randomised controlled study will include pre-operative screening with a 2 simple questionnaires and the patient will be randomised into a "choice" and "no choice" groups. The group with the choice will be offered 2 different doses of intrathecal morphine (100, 200 mcg) which they can decide on after being given a standard script explaining advantages and disadvantages of each dose. Following cesarean section patients will be followed up at 3, 6, 12, 24, 36, 48 hours following spinal injection to assess severity of pain, time to first analgesia, total analgesia requirements, treatment of nausea, vomiting and pruritus.