Normal Vermis Development
- Vermis grows rostro-caudally, covering the 4th ventricle:
- Usually complete by 18 weeks gestation.
- May continue developing up to 24 weeks gestation.
Clinical Significance of Gestational Age at Diagnosis
- Vermian hypoplasia identified before 24 weeks:
- Approximately 50% resolve by term (Patek et al. 2012).
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