The main mechanisms regulating growth differ at different stages of life, and growth patterns are divided into intrauterine and postnatal growth according to the regulatory mechanisms. Postnatal growth is further divided into infancy, childhood, and adolescence. The following is mainly about postnatal growth. 1, infant growth: generally position the time after birth to 2 years. During this period, the growth rate of physical growth is at its peak, 25cm in the first year after ascending, 10cm in the second year; weight growth is 4 times as much as at birth by the age of 2. The growth rate gradually decreases after the age of 2. Its growth regulation mode is mainly nutrition, pro-growth axis regulation and genetic influence from the age of 1 year to 2 years after the full emergence, that is, the growth and development within the age of 2 years is mainly nutritional influence. 2, childhood growth: the time from 2 years old to the beginning of puberty before. The growth rate decreases and remains relatively stable at 5-7 cm/year. However, the growth rate is not continuously homogeneous and can fluctuate rapidly or slowly, and the rate can fluctuate within a year. Therefore, it should be dynamically observed for at least 6 months (preferably 12 months) or more to compare the normal judgment of growth rate. The growth during this period is mainly regulated by the growth promoting axis (including what we often call growth hormone), and can be influenced by genetics, nutrition, heart, etc. 3, pubertal growth: after the initiation of pubertal development, growth into the second post-life peak, characterized by rapid growth in height. It can also be considered to be divided into three stages. 1. starting point; 2. height surge stage; 3. deceleration stage. Temporary slow growth can occur before the sudden height increase, and some children’s growth rate can even drop to 4-5cm/year, followed by rapid growth. Rapid growth in girls generally occurs 1.32 ± 0.78 years before menarche and presents in the Tannar II-III stage (generally refers to breast development) with a magnitude of 7-8cm/year and lasts 1-3 years, of which 80% lasts 1-2 years. Rapid height gain in boys occurs about 2 years later than in girls, mostly presenting at TannarIII-IV (external genitalia, etc.), with a magnitude of 9-11 cm/year. In girls, at menarche, height growth has completed 95% of their lifetime height, after which they enter a growth decay phase, usually with a further 5-7.5cm of growth after menarche, but there are individual differences, which can range from 1-11cm. The remaining height of boys (after ejaculation) will be 1-1.5 cm less than that of girls. from the beginning of puberty until epiphyseal closure (cessation of growth), girls can grow a total of 25 cm and boys 28-30 cm. During this period, the growth promoting axis and the hypothalamic-pituitary-gonadal cycle synergistically regulate the growth pattern. The main relevant hormones are commonly growth hormone, growth factor, gonadotropin, sex hormone, thyroid hormone, etc., as well as psychological, nutritional and genetic influences.