Thelarche

Thelarche refers to the onset of breast development in females, typically marking the beginning of puberty. It's characterized by the appearance of breast buds, which are small, firm mounds of tissue beneath the nipple and areola. Thelarche usually occurs between the ages of 8 and 13, though this can vary among individuals and populations.

Additional Information

Thelarche is triggered by hormonal changes, primarily an increase in estrogen levels. It's often the first visible sign of puberty in girls, usually preceding other changes like the growth of pubic hair and the onset of menstruation (menarche). The process of breast development continues throughout puberty and can take several years to complete.

It's important to note that the timing of thelarche can be influenced by various factors, including genetics, nutrition, environmental factors, and overall health. Early or delayed thelarche may sometimes be a sign of underlying health conditions and should be discussed with a healthcare provider if there are concerns.