Idiopathic hypogonadotropic hypogonadism
A rare syndrome in which infants are normal at birth and throughout childhood, but do not experience the surge of hormones necessary to enter puberty. Also sometimes called isolated hypogonadotropic hypogonadism (IHH) and congenital-hypogonadotropic-hypogonadism-chh/">congenital hypogonadotropic hypogonadism (CHH).