The height of a person is related to the length of the human skeleton, especially the long bones such as the length of the leg bones have a close relationship, the bones are long, the height of the person will also grow, where the tall people, legs are long. After research, people use the growth and development of the bones in the left wrist to calculate the age at which the bones develop, which is medically known as bone age.
In general, the bone age is comparable to the actual age of a person, that is, the bone age of a 5-year-old child is also around 5 years old, and some people are behind or ahead of the bone age. The age of the bones is commonly caused by the following conditions: growth hormone deficiency, hypothyroidism, and delayed somatic growth (commonly known as late growth).
Generally speaking, children with growth hormone deficiency (pituitary dwarfism) and hypothyroidism are significantly behind in bone age, often by more than 3 years, while those with late growth are less behind, usually by 1 to 2 years.
When the child enters the development of secondary sexual characteristics, the skeletal growth is accelerated and the bone age is advanced. When the skeletal age reaches 15 to 16 years, the skeleton tends to close and height growth tends to stop.
Because bone age represents the physiological significance described above, it is common to take a left wrist film to calculate bone age when looking at height, which is used to help diagnose and predict adult height.
The development of the 29 bones is not exactly parallel and there are often individual differences, and the experience and habits of the calculator also affect the results of the reading and calculation. This is like having different ratings for the same article, but if you read it carefully, the difference should not be great.