Precocious puberty is an early sexual maturation before the age of 8 in case of girls and 9 in boys. There are two types: isosexual precocious puberty--characteristic are appropriate for the child's genetic and gonadal sex; and heterosexual precocious puberty--sexual characteristic are inappropriate for the genetic sex (feminizing syndrome in boys or virilizing syndrome in girls). Precocious puberty is an important problem in childhood gynecology pediatrics, endocrinology and psychology.