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.
This term is obsolete.
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Definition:
This disease is characterized by male infertility due to teratozoospermia. Patient sperm show defects of the head, including a misshapen rounded head and detachment of the acrosome, and the sperm fail to attach to the zona pellucida of the egg.