What is the rationale for fetal repair in spina bifida management?

• A. It shields exposed neural tissue from the amniotic environment and allows more time for nervous system development
• B. It accelerates gestation to an earlier birth
• C. It fully prevents hydrocephalus
• D. It eliminates Chiari II malformation

Answer: (A)

The main idea here is to protect the developing nervous tissue from ongoing injury before birth. In spina bifida, the spinal cord and its coverings are exposed to the amniotic environment and to mechanical forces as the fetus grows. Repairing the defect in utero seals off that exposure, reducing ongoing damage to the neural tissue and giving the nervous system more time to develop before birth. This protective approach is what underlies better neurological outcomes seen with fetal repair.

It’s not about speeding up delivery, and fetal repair does not completely prevent hydrocephalus or eliminate Chiari II malformation; those issues can still occur, though outcomes may be improved.