Klinefelter syndrome is a genetic condition that arises from the presence of an extra X chromosome in males.

Precocious puberty is a medical condition characterized by an unusually early onset of puberty.

Pediatric endocrinologists are medical specialists with extensive training in the endocrine system.

Puberty is a challenging time for teens, both physically and emotionally.

Early puberty is a condition in which a child begins to develop secondary sexual characteristics, such as breast development or the growth of pubic hair, at a younger age than is typical.