The investigators technique employs an open abdomen/exteriorized (but closed) uterus methodology that allows the minimally invasive closure of the fetal neural tube using the same closed skin repair currently employed at Baylor College of Medicine/Texas Children's Fetal Center using the open uterus approach. The technique employs a novel approach to low pressure uterine distention using the same carbon dioxide gas 8-12 mmHg that others attempting fetoscopic repair have used, but employing a much lower gas flow rate and pressure. In addition, our technique allows a significantly quicker neural tube repair because of improved access to the fetus, ability to manipulate the fetus into the required position, and superior port placement resulting from the exteriorized maternal uterus.