Question
The young girl is over eight years old but less than nine. Currently, her right breast is slightly swollen, while the left side shows no reaction. Based on this situation, is the young girl’s development considered normal?
Answer
Precocious puberty is defined as the onset of secondary sexual characteristics in females before the age of 8 and in males before the age of 9. The first sign of female secondary sexual characteristics is breast development. If breast development begins before the age of 8, it is important to consider the possibility of precocious puberty; breast development after the age of 8 falls within the normal range.