The child’s height can be estimated by bone age test and combining with parents’ height. 1. Bone age test: Determine the age of bones through X-ray, analyze and comprehensively calculate the epiphyses and metaphyses of intestinal tuberosity, metacarpals, metatarsals and other joints, so as to project the height. Projecting height by measuring bone age is a more accurate method, which can accurately reflect the level of individual development and growth, and understand the potential of children’s growth and development, but it is not absolute, and the results are for reference only. 2. Combined with the parents’ height: the boy’s height is the father’s height plus the mother’s height, plus 13, and then divide the result by 2, and finally add or subtract 5. The girl’s height is the father’s height plus the mother’s height, minus 13, and then divide by 2, and then add or subtract 5. You want to correctly deduce the child’s height to comprehensively analyze all aspects of the factors. The child’s height is also related to the environment, diet, daily routine, etc., should let the child maintain sufficient sleep, eat more food rich in protein and vitamins, usually more exercise. If you find that your child is growing slowly, you should seek medical attention.