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Classification of hypogonadotropic hypogonadism (adapted with permission from Ref. [63])
| Congenital |
| Kallmann syndrome |
| Idiopathic hypogonadotropic hypogonadism |
| Acquired |
| Tumors of the hypothalamus and pituitary gland |
| Granulomatous disease |
| Empty sella syndrome |
| Hemochromatosis |
| Obesity |
| Anabolic steroids |
| Aging |
