There is no optimal age for children’s bone age examination, it depends on the child’s situation, each child’s growth is different, it is necessary to combine with the child’s growth status, whether to choose to measure bone age. Generally speaking, if children’s physical growth is normal and up to standard, there is no need to give the child bone age determination, but if you find that your child’s height growth is slow, shorter than his or her peers, there is no age limit, it is recommended that you go to the hospital in time to do bone age test. Bone is mainly used to calculate the process of human development by observing the actual developmental changes of children’s bones. There are differences in nutrition, genetics, race, geography and other aspects between different individuals, so there are some differences between bone age and the actual growth age of children. Children’s growth and development are susceptible to a variety of factors, so if you notice any abnormalities, it is recommended that you seek medical attention in a timely manner.