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