There are many causes of short stature, but the following four are more common clinically: 1. Genetic and family factors If there are members in the family who are short in stature, then the next generation is more likely to suffer from dwarfism. However, genetic factors can also be influenced by environmental factors of growth in later life. 2. Low birth weight and length If the child’s weight at birth is lower than the normal birth weight (usually 2.5 kg), whether it is a premature or full-term child, most of these children are shorter than those with normal birth weight and height at all ages and in their final adulthood. If the mother has severe malnutrition during pregnancy or suffers from chronic heart, lung, liver and kidney disease, it may cause fetal growth disorders, making the child’s height in fetal life and after birth lower than normal. 4, some endocrine diseases such as growth hormone, which is closely related to the growth of height after birth, if the lack of growth hormone may cause the child’s short stature; another example is thyroxine, which can regulate the body’s metabolism, if the lack of thyroxine, not only can lead to the child’s short stature, but also may seriously affect the children’s intellectual development.