People grow the fastest in the first 9 months of life, before being born. After birth, this slows down. Once a child is 8 years old, they will grow at an average of 2. After this, the growth plates stop making new bone, and the person will stop growing. The hands and feet stop growing first, then the arms and legs. The last area to stop growing is the spine. Scientists have identified more than different genes that determine height. Some of these genes affect the growth plates, and others affect the production of growth hormones.
Normal height ranges are different for people from different ethnic backgrounds. Again, this is determined by their DNA. Males tend to be taller than females. Males may also continue growing for longer than females.
On average, an adult male is 5. Learn about what age girls stop growing and what age boys stop growing here. Once a person has been through puberty, the growth plates stop making new bone. They fuse together, and the person stops growing. This means that when a person reaches 18 years of age, they are not able to increase their height.
Practicing good posture and keeping the back and core muscles strong can allow a person to stand straighter and appear taller. Learn more about growing factors that affect height as an adult here. Height is largely determined by DNA. However, environmental factors such as nutrition and exercise can affect growth during development.
As children get older, they need good nutrition and plenty of exercise to help their bodies make the hormones they need to grow. Teenagers will experience a growth spurt during puberty. It is based on the child's stature, weight, and the average stature of the two parents. The first calculator above is mainly based on this method. Note that it is most applicable to Caucasian children between the ages of 4 and 9 who are free from any growth-related condition or disease.
These growth charts consist of percentile curves illustrating the distribution of specific body measurements of children in the United States. In total, there are 16 charts that contain data that can be used to compare the growth of a child over time.
Measurements such as height, weight, and head circumference of a child can be compared to the expected values based on data from these growth charts of children of the same age and sex. In general, children maintain a fairly constant growth curve, which is why these charts can be used to predict the adult height of a child to a certain extent.
There are also some very simple, but less accurate, methods available. One of them is adding 2. The second calculator above is based on this method. Another simple method is to double the height achieved by the child by age 2 for a boy, or age 18 months for a girl. As mentioned above, very tall parents are more likely to have a taller child, while very short parents are more likely to have a shorter child, with the child being more likely than their parents to be closer to average height.
After the growth spurt during puberty, which differs slightly for girls and boys, neither will typically grow much more, and girls typically stop growing by 15, while boys stop at around 18 years of age. That being said, there are environmental factors that can affect the height of a child. Some of these may be within the control of the child, while many may not. Nutrition and health of the mother during pregnancy can affect the height of their unborn child.
The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health. Is height determined by genetics? From Genetics Home Reference. Topics in the Genetics and Human Traits chapter Are fingerprints determined by genetics? Is eye color determined by genetics? Is intelligence determined by genetics? Is handedness determined by genetics? Is the probability of having twins determined by genetics?
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