Patient's question:
I don't know if he has this condition, and his mental state isn't good either. Could you please tell me what is the latest time for the anterior fontanelle of the baby to close?Doctor's answer:
Hello, the diameter of the anterior fontanelle 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 begins to shrink around 6 months of age as the frontal bone and parietal bones gradually ossify, and it typically closes around 18 months. The posterior fontanelle is a triangular gap formed by the parietal and occipital bones, located at the back of the head. It usually closes around 6 to 8 weeks after birth.