Patient's question:
The little girl is over eight years old but under nine. Currently, her right breast is slightly swollen, while the left one shows no reaction. Please ask, at what age is it normal for a girl to develop?Doctor's answer:
Hello, the concept of precocious puberty refers to the onset of secondary sexual characteristics in girls before the age of 8 and in boys before the age of 9. The order of the appearance of secondary sexual characteristics in girls is breast development, the appearance of pubic hair, and menarche. Breast development is the first to appear, so we generally use the onset of breast development as a standard. If breast development begins before the age of 8, it is important to undergo examination to rule out precocious puberty. Breast development after the age of 8 can be considered normal.