1.Determination of short stature The height is below the third percentile of the growth curve of normal healthy children of the same age and sex or below -2SD (two standard deviations) of the height control table, that is, short stature. Short stature is defined as height below two standard deviations from the average height of normal children of the same age and sex, or height below the third percentile line. There are many factors that affect children’s height: genetics, nutrition, environment and the presence of certain diseases, such as endocrine metabolic diseases that can cause children to grow slowly or even stagnate, resulting in a reduction in final height. Short children are not only prone to low self-esteem and psychological barriers, but also affect their future life, social life and job search. If you find that your child is short, please consult a doctor as soon as possible and get timely treatment. 2.Does the growth of normal children’s height have a pattern? The growth of normal children’s height is a regular and continuous process. The average length of a normal newborn at birth is 50 cm. The first year after birth is a period of accelerated growth, with an average growth of 25 cm a year, i.e. an average height of 75 cm at the age of 1 year. In the second year, the average growth is 10 cm, i.e., 85 cm at age 2. Later growth slows down to about 5-8 cm per year. Adolescence is another growth acceleration period, the final sprint stage of height growth, and the whole adolescence is about 25-28 cm taller. 3.What is growth hormone? What does it do? Human growth hormone is a protein produced by the anterior pituitary gland and is the most important hormone for regulating human height. Its main role is to promote the proliferation and differentiation of bone scale chondrocytes, so that the bone grows and the human body grows taller. Insufficient or lack of growth hormone will cause children’s growth rate to slow down or even stagnate. 4.Does precocious puberty affect the final height of the child? Precocious puberty refers to the development of secondary sexual characteristics before the age of 8 for girls and 9 for boys. Due to the early secretion of androgens, the growth of children with precocious puberty is accelerated, the bone age is advanced compared with the actual age, the bone scale is closed early, the growth period is shortened, and the growth is stopped early, resulting in the reduction of the final height of adults. Therefore, children with precocious puberty should be seen as early as possible for early formal intervention and treatment. 5.How to do if your child is short Once you find that your child’s height is not normal, you should immediately go to a regular hospital for relevant examinations to clarify the cause and receive professional guidance from your doctor. Do early detection, early diagnosis and early treatment.