Pediatrics Growth, Development, and Behavior e150ec2f Anterior fontanelle closes by what age? A At term B 1 month C 18 months D 28 months High-Yield Explanation Ans. is 'c' i.e., 18 months * Closure of anterior fontanel - 1[?]5 years (between 1 to 2 years).* Closure of posterior fontanel - 2-4 months.