There are many factors that affect the height of children, not just genetics?
Growth hormones, sex hormones, nutritional factors and so on all affect the height of children.
1, growth hormone: human growth two sudden increase period; first, is the first year after birth, 20-25 cm taller, the second, is before the development, annual growth 8-10 cm taller; especially girls. The growth at this time is mainly regulated and controlled by the hormones secreted by the endocrine system, which generally grows 5-6 cm per year. Insufficient concentration of growth hormone makes poor growth, and growth hormone plays a leading role.
2. Sex hormones: Growth accelerates during puberty, mainly because sexual maturity accelerates skeletal maturation, while also prompting epiphyseal closure, and growth stops. Therefore, precocious sexual maturity leads to short development.
3. Nutritional factors: While the basic process of growth is regulated by genetic factors, the expression of genes is influenced by the internal and external environment. If, the undesirable factors affecting gene expression can be removed, children can mostly reach the due genetic height. However, some undesirable factors, such as disease, long-term picky eating, partial eating and unreasonable factors, zinc factor deficiency, etc. can affect height.
4, mental illness: the human body is a social whole, social factors have an impact on the growth of children, such as, mental tension, lack of sleep, poor family environment, etc. can affect the GH-IGF axis function of growth control, affecting height. In addition, wasting diseases such as poor digestion and absorption, chronic infections, hypothyroidism, and diabetes also affect children’s height.
Height growth is a long observation and no part of it should be neglected. When a child grows <7 cm/year until the age of 3; 3 years old - puberty growth <4 cm/year; growth retardation can be diagnosed. Short stature can be diagnosed when the height is more than 5 cm below the average height of the same age and gender. The cause should be actively searched for and actively treated for intervention.