Growth and development can be roughly divided into three stages: 1, infancy (under 3 years old, that is, the first two years after birth, that is, the rapid growth period) Birth to 3 years old, is the child’s rapid growth period, the fastest growth rate in the first year after birth, can increase by 25 cm, the second year of infancy about 12 cm, this period is mainly the nutritional status and growth hormone regulation.
2, childhood (3 years old – before puberty) is a stable growth period Girls month 10 years old, boys about 12 years old, this period of growth is mainly regulated by growth hormone and thyroid hormone, growth of 5 to 7 cm per year.
3, puberty (accelerated growth period) growth hormone and sex hormone work together, sex hormone in addition to promote growth, but also promote sexual maturity and epiphyseal closure, eventually leading to height growth stop, after entering puberty, children can average 7 ~ 10 cm per year, the period lasts about 3 years, during this period a total of 25 ~ 28 cm height gain. Boys puberty is 2 years later than girls, so they can get about 10 cm taller than girls.
So infancy and adolescence for a child’s height is the golden period, once you miss these two periods of regret is too late. To make these two golden periods fully developed.