Question
The baby’s fontanelle has completely closed by ten months old. How will this affect brain development? What changes in head circumference measurements have been observed in the first few months after birth?
Answer
According to the normal range of head circumference measurements, a baby’s head circumference is approximately 33 to 34 centimeters at birth, increasing by about 6 centimeters in the first three months, reaching about 46 centimeters by one year, 48 centimeters by two years, and then increasing by about 6 to 7 centimeters between the ages of 2 and 15. By the age of 5, it is approximately 50 centimeters, and by the age of 15, it is about 54 to 58 centimeters. If the fontanelle has closed completely by ten months old but the head circumference remains within the normal range, and the baby shows no other abnormalities such as an abnormally small or large head circumference, there is usually no need to be overly concerned. The baby’s growth status, such as weight and head circumference increase, as well as mental state and appetite, are all important indicators for observation. It appears that your child is fine so far. It is recommended to continue monitoring and regular check-ups to ensure the child’s normal development and healthy growth.