Patient's question:
No.Doctor's answer:
Hello, the diameter of the anterior fontanelle is approximately 1.5-2.0 centimeters at birth. 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.