What is hypogonadotropic hypogonadism?

HH, more common than primary, defecit in GnRH. Low-normal or low T, FSH and LH Etioloiges (hyperPRL (supresses them) pituitary lesion, cushing's, drug use (opiates), anabolic steroids, pitutary irradiation, iron overload, kallmann, idiopathic or genetic disorders (prader-willi)