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).
Is 32 cm head circumference at birth?
Measurement of the head circumference is a routine yet critical part of newborn, infant, and toddler health supervision care. Abnormal head growth may indicate a medical or developmental problem and often leads practitioners to further evaluation. Normal head circumferences in term infants range from 32 to 38 cm.
When should I be concerned about my baby’s head size?
If your baby’s head is measuring small or is not growing: Your baby’s doctor may be concerned about failure to thrive (when a child doesn’t take in enough calories or is unable to utilize them and doesn’t grow properly as a result).
How many CM should a baby’s head grow?
From birth to 3 months of age the average increase in your baby’s head circumference is usually 2 cm or . 78 inches each month. From 4 to 6 months of age, the head circumference or head growth slows to about 1 cm per month.
What does baby head size indicate?
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 does head size indicate?
He says measuring the size of the head does give some indication of how big the brain is. Hurlburt: Even though head size also depends on factors such as the muscularity of the head and thickness of the bone, it’s very likely that a bigger head means a bigger brain.
Why do some babies have small heads?
Microcephaly is a condition where a baby’s head is much smaller than expected. During pregnancy, a baby’s head grows because the baby’s brain grows. Microcephaly can occur because a baby’s brain has not developed properly during pregnancy or has stopped growing after birth, which results in a smaller head size.
What is abnormal head circumference?
Macrocephaly refers to an overly large head. It’s often a symptom of complications or conditions in the brain. There’s a standard used to define macrocephaly: The circumference of a person’s head is more than two standard deviations above average for their age. Or, their head is larger than the 98th percentile.
Should I worry if my baby has a small head?
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.
Does baby head size determine intelligence?
Preliminary studies have suggested links between brain size, head size, and IQ, but head circumference isn’t directly correlated with intellect. Among the many things that expectant parents hope for in a newborn is, a big head — maybe not so much at birth, but shortly thereafter.
What is a normal head size?
According to Wikipedia, one study in the United States shows, the average adult head circumference to be 55cm (21 3⁄4 ) in females and 57cm (22 1⁄2 in) in males. Another study conducted in UK shows a slightly different result: with the average female head size being 55.2 cm and the average male head size being 57.2 cm.
Does a small head always mean microcephaly?
Microcephaly in children is a rare and genetic condition. Some children with microcephaly are both with normal intelligence and have normal developmental milestones, but their heads will always be smaller than normal children for their age and sex. Even in such cases, a regular follow-up with the doctor is advised.
How fast do newborns grow?
From birth to age 6 months, a baby might grow 1/2 to 1 inch (about 1.5 to 2.5 centimeters) a month and gain 5 to 7 ounces (about 140 to 200 grams) a week. Expect your baby to double his or her birth weight by about age 5 months.
What causes babies to have large heads?
Causes of macrocephaly include: Benign familial macrocephaly – other family members with big heads (inherited) Excess fluid in the brain – benign extra-axial fluid of infancy or hydrocephalus.
Does baby’s head change shape?
Don’t worry this is very normal. Their heads will round themselves out a week or longer after birth. Your baby’s head shape may change again once they hit the 1- to 2-month mark. This is also normal and is usually just caused by your baby lying on their back or one side for too long.
Is head size related to intelligence?
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.