Open spina bifida, usually myelomeningocele, exposes neural tissue through a defect in the fetal spine. Prenatal repair aims to close the defect earlier, limit ongoing exposure and trauma, and improve selected neurological and hindbrain outcomes. It does not restore spinal cord tissue already affected and does not eliminate lifelong disability.
Assessment is multidisciplinary
Evaluation may include expert neurosonography, fetal MRI, fetal echocardiography, amniocentesis or other genetic assessment, lesion-level evaluation, hindbrain herniation, ventricular size, lower-limb movement, foot position, other anomalies, placental position, cervical length, maternal health, body habitus, uterine history, and psychosocial readiness.
Paediatric neurosurgery, maternal–fetal medicine, anaesthesia, neonatology, radiology, genetics, rehabilitation, urology, and orthopaedics may all contribute to counselling.
Evidence and technique must be distinguished
The MOMS randomised trial demonstrated benefits for selected fetuses after open prenatal repair, including reduced shunt placement and improved selected motor outcomes, but also important maternal and obstetric risks. Fetoscopic repair uses small ports and avoids a large hysterotomy, but techniques vary and evidence continues to evolve.
NICE guidance states that evidence for fetoscopic prenatal repair remains inadequate in quantity and quality and recommends use only in research, in specialised centres, with specific training and multidisciplinary selection. Families should be told which evidence applies to the exact technique offered and whether the procedure is clinical care, innovation, or research under the relevant local governance.
Follow-up is lifelong
Prenatal closure does not remove the need for neonatal neurosurgical assessment or long-term management of mobility, bladder, bowel, hydrocephalus, tethered cord, orthopaedic needs, skin care, and development.
Fetoscopic spina-bifida repair is an assessment pathway. Any intervention requires case-specific eligibility and final institutional approval within a research or innovation pathway; it is not presented as equivalent to established open prenatal repair. See the dated programme-status panel.
The essential distinctions
Understanding the spinal finding comes before choosing surgery.
The level of the defect and the proposed repair technique must be considered separately.
- Define the anatomy
Ultrasound and MRI assess the spine, brain, ventricles, and associated findings.
- Understand the defect
Lesion level, neurological findings, genetics, and maternal factors affect counselling.
- Separate the techniques
Open and fetoscopic repair have different evidence and implications. A technique-specific discussion is essential.
Visual decision pathway
Fetoscopic spina bifida: research-governed pathway
Eligibility, technique-specific evidence and institutional research governance must all be satisfied before an offer can exist.
- PhenotypeComplete fetal assessment
Neurosonography, MRI, lesion level, ventricles, movement, other anomalies and genetics.
- MaternalAssess pregnancy feasibility
Maternal health, uterine history, placenta, cervix, body habitus and psychosocial readiness.
- EvidenceSeparate open from fetoscopic data
Do not transfer benefits or risks between techniques without technique-specific evidence.
- GovernanceVerify research approval
Specialist centre, protocol, ethics, training, consent, registry and adverse-event oversight.
- ChoiceCompare all pathways
Research intervention, postnatal repair and pregnancy options with lifelong follow-up needs.