Patients will be randomly assigned to receive either gabapentin or a placebo. In addition, all patients will receive the usual standard of care and medication for pain (intrathecal morphine,oral paracetamol and diclofenac). At 4, 12, 24 and 48 hours after the operation, patients will be asked about their pain and satisfaction with pain management. The dose of gabapentin given is thought to be safe for the baby, and we plan to investigate whether the gabapentin has any effect on the baby's pain response when given his/her vitamin K injection. Gabapentin has also been shown to reduce long-term pain that can develop, and patients will be followed up at 6 weeks to be asked about their pain at that time.