There are many factors that affect height, such as heredity, nutrition, exercise, environment, living habits, race, endocrine, sexual maturity (menarche age 18 ratio1height 5 cm), distant marriage, medical progress and so on.
Extended data
Basic common sense
The material basis of human height is bones. Height is mainly related to the long bones of skull, spine and lower limbs.
Experts remind that human physical development is a very complicated process, from top to bottom, from near to far. The head develops the earliest. The head length of a newborn is 1/2 of that of an adult, while the head length of a newborn is 1/4 of its own body length. In contrast, the development of lower limbs is late, and the newborn is only 1/4 of that of adults at birth.
Changes in the development ratio of various parts of the body from fetal development to adult development. Generally speaking, under normal circumstances, the birth time of a person is about 50 cm; 1 year-old is a 1 leap in height growth, which can grow to about 75 cm; 2 years old to about 85 cm; 3~7 years old, the annual increase of 6~ 15 cm.
Students' Physical Health Network —— The Evolution and Development of Students' Physical Health Evaluation System in China