Monarch Disease Ontology entry MONDO_0018800 (Kallmann syndrome) (KS) is a developmental genetic disorder characterized by the association of congenital hypogonadotropic hypogonadism (CHH) due to gonadotropin-releasing hormone (GnRH) deficiency, and anosmia or hyposmia (with hypoplasia or aplasia of the olfactory bulbs). Also known as: Kallman syndrome, Kallman's syndrome, Olfacto-genital pathological sequence, congenital hypogonadotropic hypogonadism with anosmia, familial hypogonadism with anosmia, hypogonadism with anosmia, hypogonadotropic hypogonadism with anosmia.