Hypogonadotropic Hypogonadism 13 with or Without Anosmia, also known as hh13, is related to hypogonadotropic hypogonadism 2 with or without anosmia and hypogonadotropic hypogonadism 18 with or without anosmia. An important gene associated with Hypogonadotropic Hypogonadism 13 with or Without Anosmia is KISS1 (KiSS-1 Metastasis Suppressor). Affiliated tissues include pituitary and uterus, and related phenotypes are decreased serum estradiol and decreased circulating luteinizing hormone level