1. The neural groove closes dorsally during which week of gestational life?
2. A healthcare professional advises a pregnant woman to add supplements of which nutrient to her diet to prevent birth defects?
3. Which defect of neural tube closure is most common?
4. What is the anomaly in which the soft bony component of the skull and much of the brain is missing?
5. What is the most common cause of obstructive hydrocephalus in infants?