Boys and girls grow at different rates. During puberty, boys undergo the most significant height growth. However, the age at which puberty begins varies for each boy, making it difficult to predict exactly when they will stop growing in height.

Girls tend to mature faster than boys, and the age at which a girl stops growing in height depends on the age at which she has her first menstrual period. However, the physical condition of each girl is different, so some children may experience early or late puberty. This can significantly affect their growth.