Your baby's head will develop at the quickest pace throughout the first four months following delivery. This increase is related to accelerated brain development. At birth, the average head circumference is roughly 13.5 inches. It will continue to grow at this rate for about 1.5 years before slowing down until age 10. Overall, head growth after birth is relatively equal to arm and leg growth. However, due to its greater proportion of muscle vs. bone, the brain accounts for nearly all of the growth in the head.
In fact, the only part of the body that doesn't grow after birth is hair. The reason for this is not clear but may have something to do with the need for precise positioning of nerves inside the skull during fetal development. Also, since there is no new skin to cover the bones, they don't grow either.
In conclusion, the head grows the most between birth and age 4 followed by adulthood. Males tend to reach their maximum size earlier than females. Black individuals tend to have heads that are larger than white or Asian individuals of the same age.
The head circumference or growth rate decreases to roughly 1 cm each month between the ages of 4 and 6 months. Now, these are only recommendations, and each kid is unique, so don't be afraid if your baby's head is growing quicker than usual. The only thing that matters is that your baby's head is growing, and it is!
There are several factors that may affect how fast your baby's head grows including: diet, nutrition, health issues, stress levels, medications, pregnancy complications, etc.
So, if your baby's head is growing faster than expected, don't worry about it. Just make sure that you keep feeding your little one healthy meals throughout the week to ensure that his body has what it needs to grow into a healthy adult size head.
A newborn grows between 10 and 12 inches in length (or height), and his or her proportions vary throughout the first two years. The percentage of an infant's head reduces from 1/3 of the overall body at birth to 1/4 at age 2, and finally to 1/8 by adulthood. The development of the fetal and neonatal brains is extremely fast. By the end of the first month, myelination of the nervous system has nearly finished, and most nerves are completely covered by fibers of myelin sheath.
After birth, a child's body continues to change as it grows older. The brain and the central nervous system continue to develop until a person reaches their mid-20s. At this time, the human brain is still growing in size even after decades of development. Scientists have found that the human brain increases in size by about 100 grams (3.5 oz) every year up to the age of 20, and then starts to shrink.
The bone density of an adult remains constant until the late 30s when it begins to decrease slowly but steadily. Women may experience a decline in bone mass after menopause. Men also experience a reduction in bone density, but at a slower rate. Older people are more likely to break bones due to osteoporosis than young people.
The heart develops continuously throughout a person's life. In fact, the heart muscle cells called cardiomyocytes are born even after a person reaches maturity.
By the conclusion of the first year, your baby's head circumference should be close to 18 inches. It grows another inch or more during the next year, bringing their heads near to adult size. At birth, the average head size is about 14 inches around, with males' heads being slightly larger than females' heads (about 15 inches vs 13 inches). Fat stores account for most of the increase in size that occurs after birth; muscle accounts for only a small part.
In fact, experts used to think that the maximum head size was limited by health reasons. They believed that if the head became too large, it could cause problems for the brain and other parts of the body. However, recent research has shown that babies' heads can grow up to six inches long during their first year of life!
The best way to measure the size of your child's head is with an accurate measuring tape, held just below the neck with the arms fully extended. There are several different methods used to calculate how much fat versus muscle exists in the head. One method is to divide the head circumference by three to get an estimate of the percentage of body fat. Another method is to multiply the weight of the head by 0.789 to get an estimate of the percentage of body fat.