Generally, it is not necessary to measure the bone age of a child because most of the methods of measuring bone age require the use of some radioactive means, flat films or other observations before the child can be judged accordingly and may receive a radiation exposure. In addition, even if the child’s bone age is known, there is no significant impact or intervention on the child’s future growth and development. The following are some of the common situations for which bone age measurement is recommended in clinical practice: 1. If the child wants to engage in sports-related work in the future, such as being a basketball player. 2. If the child has some congenital disease, such as congenital scoliosis or other bony deformities. If the child has a serious deformity that requires orthopedic surgery, the bone age can also be measured. Because the bone age can determine when to do this orthopedic surgery, not only does not affect the child’s growth and development, but also can maximize the release of deformity.