Girls generally stop growing taller around the age of 20, but not absolutely based on age to judge, growth also has a lot to do with genetics, individual development, acquired nutritional status and epiphyseal closure, etc. 1, genetic factors: if the parents are tall, the offspring usually will not be short, but some girls due to the influence of recessive genes, there will be no parents high phenomenon; 2, individual development: due to the growth and individual differences, some people can be earlier to complete the stereotypes of height, and some people later to complete the nutritional status after puberty. Due to the growth situation and individual differences, will lead to some people develop earlier, can be completed earlier on height stereotypes, there are some people develop later, to puberty before they stop growing taller; 3, acquired nutritional status: for girls with adequate nutrition, because they can meet the nutritional needs of their own growth, the growth period may last longer, and better height development, and for the more nutritionally deprived people. When in the growth stage, due to insufficient nutrition supply, may not reach their own standard height, has stopped growing; 4, whether the epiphysis is closed: can be checked by X-ray whether the epiphysis is closed, to determine the time to stop growing, when the epiphysis is not closed, may continue to grow; if the epiphysis has closed, or even completely disappeared, there is almost no chance to grow taller. Therefore, there is no specific judgment on when girls stop growing taller, but generally they will stop growing taller by late puberty. For adolescents in puberty, they should supplement their nutrition, eat a balanced diet, and eat more milk, eggs, soy products, and fresh fruits and vegetables in moderation. Also should be appropriate exercise, such as jumping rope, high jump, play basketball, etc., to ensure their own healthy growth.