Hypogonadotropic Hypogonadism 18 with or Without Anosmia, also known as hh18, is related to hypogonadotropic hypogonadism 2 with or without anosmia and hypogonadotropic hypogonadism 13 with or without anosmia. An important gene associated with Hypogonadotropic Hypogonadism 18 with or Without Anosmia is IL17RD (Interleukin 17 Receptor D). Affiliated tissues include pituitary and ovary, and related phenotypes are osteopenia and osteoporosis