Fontanelle Closures
by Cathy Parkes January 18, 2021 Updated: December 29, 2021

A child's posterior fontanelle closes between 6-8 weeks. The anterior fontanelle closes between 12-18 months.
Just as baby is on her back first then her front later, posterior (back) fontanelle closes first then anterior (front) closes later.
Just as baby is on her back first then her front later, posterior (back) fontanelle closes first then anterior (front) closes later.
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