What Causes Small Head Size?

When should I worry about my head circumference?

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..

What size head is microcephaly?

Microcephaly is defined as a head circumference 2 standard deviations (SDs) below the mean for age and sex or roughly less than the 2nd percentile. Conversely, macrocephaly is defined as a head circumference greater than 2 SDs above the mean or greater than the 98th percentile.

Are babies with small heads less intelligent?

Head circumference has essentially nothing to do with intelligence and, as long as your child’s head is average-size and regularly growing, there’s no cause for alarm when they come in a bit behind the curve. Still, a handful of preliminary studies have suggested links between brain size, head size, and intelligence.

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.

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.

Why is my head smaller than normal?

The growth of the skull is determined by brain growth. Brain growth takes place while a baby is in the womb and during infancy. Conditions that affect brain growth can cause smaller than normal head size. These include infections, genetic disorders, and severe malnutrition.

Can someone with microcephaly have normal intelligence?

Most children with microcephaly also have a small brain and intellectual disability. Some children with small heads have normal intelligence. Microcephaly may be caused by problems during a woman’s pregnancy. In some cases, it may be caused by inheriting an abnormal gene.

How can you prevent microcephaly?

While you’re pregnant, you can take steps to try to prevent acquired microcephaly:Eat a healthy diet and take prenatal vitamins.Don’t drink alcohol or do drugs.Stay away from chemicals.Wash your hands often, and get treated for any illness as soon as you feel sick.Have someone else change the litter box.More items…•

Should I be concerned if my baby’s head is small?

Chances are your doctor will detect microcephaly at the baby’s birth or at a regular well-baby checkup. However, if you think your baby’s head is smaller than normal or isn’t growing as it should, talk to your doctor.

In healthy volunteers, total brain volume weakly correlates with intelligence, with a correlation value between 0.3 and 0.4 out of a possible 1.0. In other words, brain size accounts for between 9 and 16 percent of the overall variability in general intelligence.

What is the life expectancy of someone with microcephaly?

There is no standard life expectancy for microcephalic babies because outcomes depend on so many factors, and the severity of the condition can range from mild to severe. Babies with mild microcephaly may still meet the same milestones like speaking, sitting and walking as a child without the disorder.

When can microcephaly be detected?

Although microcephaly and intracranial calcifications are typically detected during ultrasounds in the late second and early third trimester of pregnancy, these findings might be detected as early as 18-20 weeks gestation.