1, childbirth affects the height of children born with intrauterine growth retardation, prematurity is less than normal newborns, of which 10% to 15% of children, after two years old can not catch up to the normal height curve; breech birth, obstructed labor, birth asphyxia, traumatic brain injury and other medical history combined with slow growth. 2, obesity affect the child’s height 3, drugs affect the child’s height had taken or long-term use of height, immune enhancement, glucocorticoids or kidney benefit part of the Chinese medicine children, combined with excessive sexual development, growth spurt early. In children with hypothyroidism, some children with congenital hypothyroidism develop before the age of 2 years, which can cause mental retardation if left untreated, but the onset after the age of 2 years usually shows symptoms such as growth disturbance, constipation, anemia, low activity, and low appetite. Another point to be wary of is the side effects of certain medications in the treatment of the disease, which can also hinder development, such as Ritalin and other stimulant medications in the treatment of ADHD, which have been found to have an effect on development. Therefore, if you need to take a particular drug, you must choose the prescription and the amount of medication carefully. 4, the parents’ age of childbirth affects the height of the child Studies have shown that the height of a person is determined by a number of factors. For example, the number of children in the family, as well as the order of birth of children will affect the child’s height. For example, the average height of children born to parents who are engaged in strong mental labor is higher than the offspring of manual laborers; urbanization also indirectly affects the height of children, for example, children in urban areas mature earlier and are physically superior to children in rural areas, and improved nutritional environment is one of the important factors. In addition, the age of the parents when the child is born will also affect the height of the child. 5, stay up late will affect the child’s height In recent years, a large number of research studies have confirmed: the amount of growth hormone secreted by short children is much less than normal children, and a significant proportion of children are due to sleep deprivation at night. As children from childhood to pre-puberty, in the sleep secretion, 9 pm to 9 am the next day the secretion of growth hormone amount is three times more than 12 hours during the day, especially in the night at 9 pm after sleep 70 minutes, can appear a peak secretion. In view of this, children should not stay up late. 6, children lack of maternal love affect height Some expert research found that emotional disorders can also affect height. If a child grows up in an environment that lacks family warmth and adequate maternal love, then his height is often shorter than children of the same age, foreign countries call this type of dwarf for emotional overshadowing short stature, some information called “love overshadowing syndrome. The main reason for this is that the hypothalamus and pituitary system are inhibited by emotions, which causes a decrease in the secretion of growth hormone from the pituitary gland. In addition to shorter height, children with this condition also have abnormal behaviors such as delayed intellectual development, excessive drinking, excessive eating, soliloquy, hyperactivity, and incompatibility in interpersonal relationships. Children with emotional masking generally have unstable sleep, lack of security, and sometimes wake up screaming and crying in their dreams, etc. These conditions can affect the quality of sleep. And children’s growth hormone – hormone is only secreted in the deep sleep period and ripe sleep period. Therefore, it is said that children with restless sleep and easy to wake up, the secretion of this growth hormone is likely to be greatly inhibited, which is also one of the important reasons why children cannot grow taller. 7, the child premature or late development affects the height of the child precocious puberty, parents should early detection, early take the child to the regular hospital specialist treatment. During the summer vacation, the number of patients in the outpatient clinic of the Center for Adolescent Growth and Development of Ruijin Hospital reached more than three times the usual number. Professor Wang Defen, director of the center, said that the standard of living is improving, urban children are developing at an earlier age, and if the bone age is too far ahead, it will affect the child’s final height and remind parents to pay attention. It is reported that the outpatient clinic of the Center for Adolescent Growth and Development of Ruijin Hospital accounts for most of the patients with precocious puberty. When the reporter interviewed at the center, a mother brought her 9-year-old daughter to the clinic. The mother said that her daughter’s breasts started to develop when she was 8 years old, and she went to Ruijin Hospital only a year later when she had her first menstruation. As a result, the doctor found that the girl’s bone age was 13 years old. The doctor’s analysis said that because the consultation was delayed for a year, and the bone age grew much more than a year in this year, the girl will not grow taller than 10 cm, therefore, the 9-year-old child is now 140 cm, the ultimate height of more than 150 cm is unlikely. 8, genetics has the absolute right to influence height Although humans still can not understand the secrets of genetics, but in this point of height, genetics has the “absolute right”. The family history of the child is the No. 1 factor affecting his adult height. look at the parents’ height, body type, assess the child’s growth and development, you will probably be able to know his adult height. 9, diet and nutrition affect height Two key elements: healthy and comprehensive The importance of nutrition is undeniable, if the child’s growth process does not get a balanced supply of nutrition, in other words, if his food intake is not healthy and comprehensive, then he will not get the normal growth and development. It is actually very difficult to do this because parents are not able to develop standard nutritional recipes for their children like a nutritionist, but it is important to note that parents should at least be healthy in the food they provide for their children. Often the problem is that parents restrict the amount of food their child eats to prevent him from becoming “chubby” (infants should not use restrictive recipes, no matter how fat they are). Also, too much juice or carbonated drinks can interfere with the child’s appetite, thus reducing his absorption of nutrients. 10, physiological conditions affect height Some children are born with some kind of serious physical disease, if not treated in a timely manner, it will hinder growth and development. The most common are: disorders of the gastrointestinal system, such as celiac disease; food allergies; thyroid problems; hormone secretion deficiencies; heart, kidney or liver disease; or some kind of chromosomal abnormality.