My son's anterior fontanel closed at eight months, is that too early?

Patient's question:

My son's anterior fontanel closed at eight months. Is it too early? Will it affect his future intelligence? Thank you

Doctor's answer:

A few normal babies' soft spots may close prematurely, but this does not mean the skull is no longer growing. Moreover, closure at ten months is very normal, and most babies start to gradually close their soft spots around this age. Many children also close their soft spots between four to seven or eight months, and it generally does not have any adverse effects. The cranial bones fit together like interlocking teeth and are relatively loose. As the brain develops and grows, the cranial bones can still develop fully. Therefore, the child's development is normal. You can measure the head circumference every two months and conduct developmental checks to see if the baby's head circumference is growing at a normal rate and if their overall development level matches their age. If it is growing normally, there is no need to worry—the soft spot is simply closing through membranous fusion. Additionally, if the baby is not likely to be deficient in calcium or other trace elements, you can temporarily stop supplementing with calcium and cod liver oil, as there are generally no other issues. Do not be concerned.