RGD uses the Human Disease Ontology (DO, https://disease-ontology.org/) for disease curation across species. RGD automatically downloads each new release of the ontology on a monthly basis. Some additional terms which are required for RGD's curation purposes but are not currently covered in the official version of DO have been added. As corresponding terms are added to DO, these custom terms are retired and the DO terms substituted in existing annotations and subsequently used for curation.
A spermatogenic failure characterized by male infertility due to asthenoteratozoospermia with severely reduced or absent progressive sperm motillity and multiple morphologic abnormalities of the flagella that has_material_basis_in homozygous or compound heterozygous mutation in the DHND1 gene on chromosome 11p15.4. (DO)