Is it normal for a 9-year-old girl to have breast development?

It is a normal physiological phenomenon for a nine-year-old girl to have breast development.
A girl’s breast development needs to go through four stages, the first stage is the development of the breast nucleus, the second stage is the development of the nipple and areola, the third stage is the development of the breast, and the fourth stage is the adult breast. A nine-year-old girl with breast development is considered to have a simple breast nucleus and nipple development, which is a normal physiological development, and when the child is seventeen or eighteen years old, the breasts will be able to develop completely.
Parents are advised not to worry too much, during this period, you need to pay attention to educate the child to wear underwear correctly, correctly recognize the development of breasts, do not feel shy and afraid of this. At the same time, attention should be paid to supplementing the child’s nutrition, to avoid malnutrition resulting in delayed breast development.