Dandan Pan, Department of Pediatrics, Affiliated Hospital of Guiyang Medical College: Hello, parents! Puberty is a necessary transition from childhood to adulthood for normal individuals. The earliest sign of pubertal development in women is usually breast development. Breast development usually starts at the age of 9-10 years old, with most of them starting on one side first and the other side developing a few months later, and a few after a year. However, there is not much difference in size between the two sides, and local inflammation and trauma should be excluded. Close observation or ultrasound examination of both mammary glands can be performed to clarify. On the other hand, Pan Dandan of the Department of Pediatrics at the Affiliated Hospital of Guizhou Medical University should be noted that entering puberty is the final stage of height growth, and generally speaking, women can have 25cm gain when they grow fully during puberty, so it is projected that your child is more likely to be as high as 160cm for life, but note that there are more factors affecting growth, such as genetic restrictions, so the predicted value is not absolute. During this period, it is necessary to cooperate with good mood, balanced diet, sufficient sleep and appropriate exercise to facilitate height growth. It is recommended to go to a local pediatric dwarf specialist for screening and regular monitoring of development and growth trends to determine if there is any lifelong height loss.