Patient's question:
NoDoctor's answer:
Hello, the diameter of the anterior fontanelle on both sides at birth is approximately 1.5-2.0 centimeters. In the first few months of life, the anterior fontanelle will expand as the head circumference increases. Generally, it will gradually shrink after 6 months as the frontal bone and parietal bone gradually ossify, and it will close around 18 months of age. The posterior fontanelle is a triangular gap formed by the parietal bone and occipital bone, located at the occipital region. It usually closes around 6-8 weeks after birth.