endocrine gonad disorder hypogonadism http://purl.bioontology.org/ontology/MEDDRA/10058359 http://purl.bioontology.org/ontology/MESH/D007006 http://purl.bioontology.org/ontology/SNOMEDCT/48130008 http://purl.obolibrary.org/obo/DOID_1924 http://purl.obolibrary.org/obo/HP_0000135 http://purl.obolibrary.org/obo/NCIT_C9227 https://en.wikipedia.org/wiki/Hypogonadism https://www.wikidata.org/wiki/Q938107 A disorder characterized by decreased function of the gonads. Clinical manifestations in both males and females include poor libido, infertility, and osteoporosis. Additional signs in males include erectile dysfunction, muscle atrophy, gynecomastia and increased abdominal fat. In females, additional signs include shrinking of the breasts and loss of, or failure to develop menstruation. female hypogonadism hypogonadism and testicular atrophy male hypogonadism The Complete Dictionary of Sexology