Growth hormone ranges from 0.06-5.0 ng/ml in normal people and 15.0-40.0 ng/ml in newborns. The amount of growth hormone in the body will change at different ages due to changes in the endocrine system. Growth hormone is a substance secreted by the pituitary gland, which promotes the growth of infants and adolescents, maintains sexual development, and promotes protein synthesis. Growth hormone plays a vital role in the body’s growth and development process, and excessive secretion of growth hormone can lead to gigantism or acromegaly, pituitary adenoma, and hyperplasia of growth hormone-secreting cells can also lead to abnormally high growth hormone secretion. Low secretion of growth hormone can lead to dwarfism, short stature and even intellectual deficiency. If detected early and treated in time, timely supplementation of growth hormone can cure the condition. Growth hormone examination can observe the growth and development of infants and adolescents, so that timely diagnosis and treatment can be made.