Patient's question:
My baby, a boy, is two and a half months old with a head circumference of 43 cm. Is that a bit large? To prevent him from spitting up, I've been letting him sleep in a semi-reclined position for naps, not lying flat, which has made his head a bit wider front to back. Is the large head circumference related to this?2. Besides the head circumference issue, he doesn’t nap much during the day but can sleep for 5 or 6 hours at night for his second nap. The doctor previously said he was calcium-deficient, so we took calcium supplements for a month, 200 mg per day. Should I continue giving him calcium supplements? He already takes fish oil drops daily.
Doctor's answer:
The head circumference of a baby is an important indicator of its growth and development. The average head circumference at birth is about 34 cm, which increases by about 6 cm at 3 months, reaching 40 cm. By one year of age, it further increases to 46 cm. Your baby, who is two weeks and two days old, has a head circumference of over 43 cm, equivalent to the combined head circumference of four or five babies. This is relatively large compared to his age.There are many reasons for an abnormally large head circumference, which can be either physiological or pathological. Physiologically, it is often related to intergenerational inheritance within the family. Such babies are in normal mental condition, exhibit good growth and development, and have no abnormalities in their cognitive abilities. On the other hand, a pathologically large head circumference is often associated with conditions such as hydrocephalus or rickets. The fontanelles may also close later in these cases, and a brain CT scan is necessary to rule out such issues.