<prompt> Which of the fontanelle is the last to close?AnterolateralAnteriorLateralOccipital  <response>: 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 