Approximately 6 weeks after the surgery a post-procedure fetal MRI will be performed. If there is evidence of good closure of the neural tube defect and reversal of the Chiari II malformation, a vaginal delivery can be attempted based on obstetric criteria. Patients will be followed in person every 3-4 months after birth to 12 months at the Spina Bifida Clinic at TCH. Remaining visits will be yearly up to 5 years. If this is not possible a questionnaire will be mailed to the child's parents and records will be requested from the treating neurosurgeon on this same schedule.