Turn off more accessible mode. Predicting a child's adult height. Here's an overview of the major physical changes girls can expect as they go through puberty: Breast Development Girls usually begin puberty between the ages of 8 and 13 years old. Find a Pediatrician.
Message sent successfully
This is due to hormone changes and is not a cause for concern. Research also has not shown a benefit from breast self-exams in the diagnosis of breast cancer. This has nothing to do with puberty or hormones.