Primary testicular failure Klinefelter syndrome Cryptorchidism Orchitis Trauma HIV / AIDS Myotonic muscular deficiency Retroperitoneal fibrosis Aging Hypogonadotropic hypogonadism Kallman syndrome Prader - Willi syndrome
Idiopathic hypopituitarism Pituitary tumors Suprasellar tumors Hemochromatosis Inflammatory, traumatic, vascular lesions of pituitary and hypothalamus Obesity Severe chronic illnesses Medication Andropause