Which of the fontanelle is the last to close?
High-Yield Explanation
* The posterior fontanelle normally closes 2 to 3 months after bih * The sphenoidal fontanelle is the next to close around 6 months after bih * The mastoid fontanelle closes next from 6 to 18 months after bih; * The anterior fontanelle is generally the last to close between 18-24 months Reference: GHAI Essential pediatrics, 8th edition