Precocious puberty is a developmental disorder in which girls present secondary sexual characteristics before the age of 8 and boys before the age of 9. Central precocious puberty (CPP) is caused by an early increase in the secretion and release of gonadotropin-releasing hormone (GnRH) from the hypothalamus, which activates the function of the gonadal axis and leads to gonadal development and secretion of sex hormones, resulting in the development of internal and external genitalia and the development of secondary sexual characteristics.