Girls usually stop growing in height between the ages of 16 and 18, but the exact age of an individual is uncertain and needs to be judged in relation to bone age and whether or not the epiphyses are closed. After breast development (9 to 11 years of age), girls reach their second postnatal peak in height growth. By the time bone age reaches 13 years, height reaches 95% of final height. X-rays can be used to determine the age of the bones and the closure of the epiphyseal lines to determine whether height growth has stopped. Some girls have early epiphyseal closure, usually around 16 years of age when the epiphyses are completely closed by X-ray and height growth stops. Some girls have late epiphyseal closure, and their epiphyses will not close until they are 18 years old or even later, and their height will stop growing. In addition, before epiphyseal closure, micronutrient deficiencies may also affect height development. Therefore, girls should pay attention to the supply of nutrients throughout the growth period to supplement calcium, fluorine, zinc and other trace elements, and maintain appropriate sports to ensure the normal development of height.