Quick Answer: How Important Is Head Circumference?

Why is head circumference important?

Another measure of infant growth is head circumference, or the size of your baby’s head.

It’s important because it can indicate how well their brain is growing.

If your baby’s brain isn’t growing properly, they may have a condition known as microcephaly..

What is the normal head circumference?

The average newborn’s head circumference measures about 13 3⁄4 inches (35 cm), growing to about 15 inches (38 cm) by one month. Because boys tend to be slightly larger than girls, their heads are larger, though the average difference is less than 1⁄2 inch (1 cm).

When should I be concerned about my baby’s head size?

For a doctor to diagnose macrocephaly, the measurement of the head around its widest part needs to be larger than the 98th percentile. Macrocephaly may sometimes be a sign of an underlying condition that requires treatment. In other cases, it may occur due to genetics, including a family history of macrocephaly.

At 8 years, head circumference at birth was no longer associated with IQ, but head growth during infancy remained a significant predictor, with full-scale IQ increasing an average of 1.56 points for each 1-SD increase in growth.

Does skull shape affect brain?

It is believed by many researchers to have had no significant effect on cranial capacity and how the brain worked, the conclusion of a 1989 study of skulls in The American Journal of Physical Anthropology.

Does a small head always mean microcephaly?

Microcephaly is a birth defect in which a baby’s head is smaller than expected, compared to babies of the same sex and age. Babies with mild microcephaly often don’t have problems other than small head size.

What is considered a big head?

The average size male head is 22″ 1/2 and the average size woman head is 21″ 3/4. The one size fits all (OSFA) hats stop at about 23″, so a person would find it difficult finding a hat that fits around a size 7 1/2 and above. In the hat world, head sizes over 23″ 3/8 would be considered a big head.

What is my head size?

To measure your head circumference, take a sewing measuring tape or even a string, and wrap around above the ears and across your eyebrows. Please stick your finger under the tape so there is a little room and there you have head circumference! If you fall between measurements go for the next size up.

What does small head size indicate?

Microcephaly is a medical condition in which the circumference of the head is smaller than normal because the brain has not developed properly or has stopped growing. Microcephaly can be present at birth or it may develop in the first few years of life.

What is a normal size baby head?

The average newborn’s head measures 13 3/4 in (35 cm) Generally, a newborn’s head is about half the baby’s body length in cm plus 10 cm. So a baby that is 18 inches long would be 45.7 centimeters (18 x 2.54). His or her head would be about 32.9 cm or a little under 13 inches.

Are big head babies smarter?

According to the study, babies with a head circumference of 12.5 to 14 inches were the most likely to be smarter. So if you’re surprised at the size of your baby’s big cranium, have no worries, it’s probably a good thing.

Does head size increase with age?

In head breadth and bizygomatic diameter he found a tendency to increase with age in both sexes in both series. The data in the literature provide no uniform conclusions or even consensus concerning the ages at which increase in each diameter of the head and face ceases.