Patient's question:
I don't know if he has this condition, and his mental state isn't good either. How long does the anterior fontanel close?Doctor's answer:
The fontanelle refers to the two soft spots on a baby's head at birth, where the bone has not yet fully developed, medically known as "fontanelles." The posterior fontanelle usually closes within 3 months after birth, while the anterior fontanelle takes about 1.5 years to close. The "sky window" or "fontanelle" commonly mentioned primarily refers to the anterior fontanelle. It reaches its maximum size of about 2.5-3 centimeters around 6 months of age. Afterward, as the cranial bones gradually ossify, the anterior fontanelle gradually decreases in size. In some children, the anterior fontanelle may close by the time they are 1 year old, and it should definitely close by the time they are 1.5 years old at the latest.