Preterm birth does not usually affect height. Height is affected by a number of factors, mainly genetics, acquired nutrition, exercise and some diseases. Usually, preterm babies may have poorer resistance than other full-term babies before the age of three. However, after the age of three, with nutritional supplements and increased resistance, the gap with full-term babies will become smaller and smaller, and their height is generally not affected by whether they were born prematurely or not. Height is affected by a variety of factors. Generally speaking, if the parents are taller, the child’s height advantage will be greater; in addition, acquired nutritional supplements, personal exercise, sleep quality and so on can all affect height, and there are also some diseases, which, if they are more serious, may cause growth and developmental abnormality, thus affecting height.