Whether or not an overweight 12 1/2 year old has room to grow needs to be determined by epiphyses. To determine if a person still has a chance to grow, an X-ray of the knee can be performed, and the remaining room for growth can be analyzed through bone age testing and epiphyseal closure analysis. If the epiphyses have already closed, there is basically no chance of growing taller. Usually, girls and boys enter puberty around the ages of 9 and 11 respectively. During puberty, height growth is accelerated, with an annual increase of 7 to 12 cm. After puberty, height growth decelerates rapidly into adulthood, and no further increase in height occurs after epiphyseal closure. At the same time, overweight can promote bone age and sexual development in advance, is not conducive to height growth. If you are overweight at 12 and a half years of age and have slow or stagnant height growth, it is recommended that you consult a doctor in a timely manner to avoid delays in your condition.