Get rid of the misconception: If the growth rate of baby’s head circumference is within the normal range, and the neurological development is in line with its age, even if the fontanelle closes early, it will not affect its intellectual development. The fontanelle is the part of the baby’s head where the skull bones are connected to each other and not yet fully ossified, and is made up of the frontal bone, the parietal bone and the occipital bone, with two fontanelles: the front fontanelle and the back fontanelle. The fontanelle is a diamond-shaped gap formed by the frontal bone and the parietal bone, also commonly known as the “sky gate cover”, located in the center of the top part of the head. When babies are born, the diameter of fontanelle is 1.5 cm-2.0 cm. In the first few months of life, the fontanelle will expand as the head grows, but after 6 months, it will shrink as the frontal and parietal bones gradually ossify and close at about 18 months. Will the early closure of fontanel affect the baby’s intelligence? Some children have their fontanel closed at 6-7 months of age, and parents are worried that it will affect the baby’s intellectual development. Although fontanelle normally closes around 18 months of age, some children close their fontanelle early, which does not mean that the skull stops growing because the head circumference stops growing until the gap between the bones fuses at 13-14 years of age. Therefore, although some babies have early closure of fontanelle, the head circumference will continue to grow as the brain develops and generally will not affect the development of intelligence. However, in one case, the early closure of fontanelle is caused by poor brain development, which can lead to delayed intellectual development. Therefore, the most appropriate way to determine whether the early closure of fontanelle will affect the child’s intellectual development is to regularly measure the head circumference and follow up on the child’s neuropsychiatric development process. The most appropriate method is to measure the head circumference and follow up the child’s neuropsychological development.