Open Myelomeningocele Repair With High Maternal BMI

Spina bifida is a neurological abnormality characterized by an opening in the skin and exposure of the spinal cord on the back of the baby at the time of birth. The complete closure and separation of the spinal cord from the skin occurs in the first month of pregnancy. This form of spina bifida is associated with leg weakness, sensation loss, and bowel and bladder incontinence. The majority of patients (\>80%) also develop increased fluid in the brain, called hydrocephalus, and require additional surgery to treat this problem. Standard treatment of myelomeningocele (MMC) involves closing the opening in the back within the first 3 days of life. The surgery releases the spinal cord from the skin and brings the skin edges together to prevent infection and injury to the exposed nerves. Of note, this type of surgery does not improve function. The investigators want to study the open in-utero fetal surgery technique in patients who are candidates for the standard open fetal repair technique but have a pre-pregnancy BMI of 35.0-40.0. The latter is a reason for exclusion for open fetal repair in most centers in the United States.