This is due to factors such as the decreased height of intervertebral discs as well as changes due to degenerative diseases. In some cases, a person's height begins to shrink in middle age, though shrinkage of stature is largely universal in the very elderly. On average, female and male growth trails off to zero at about 15 and 18 years old, respectively.
This is typically referred to as the pubertal growth spurt. During puberty, the growth rate increases again to a second maximum, after which it slowly declines to zero. The growth rate declines rapidly from birth to roughly age 2 and declines more slowly thereafter. Other important factors that contribute to a child's adult height include nutrition, health, sports activities, health and age of the mother during pregnancy, etc. This means that very tall or short parents are likely to have a taller or shorter child than average, but the child is likely to be closer to the average height than their parents.
Normally, a child's height is based on parental heights subject to regression toward the mean. Some studies suggest that genetics contributes 60%-80%. The precise contribution from these two factors is complex. The height of a person is determined by a combination of genetics and environmental factors. "How tall will I be?" or "how tall will my child be?" are questions that are often asked.
0 kommentar(er)
