Oculocutaneous Hypopigmentation Information

Oculocutaneous Hypopigmentation (OH) Fact Sheet - A fact sheet providing information about OH, OH testing and registration policies.

OH Test Results
An updated listing of OH test results. Test results are updated daily as received from authorized testing labs.

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Authorized OH Testing Labs
Access the listing and contact information for the current American Angus Association authorized labs conducting tests for OH. Additional labs will be added to the page as they are approved. Click here.

Potential Carrier Report
AAA Login users can access an interactive tool to generate a report of owned animals and their OH status based on the OH test results received to date. From the AAA Login menu go to DNA > Genetic Condition Tools and click on the "Potential Carrier Report" menu option. If you are not a current AAA Login user, click here to create your online profile.

Notice of Dec. 8, 2015 - Genetic Condition Update - A second Angus bull was identified as a carrier of Oculocutaneous Hypopigmentation (OH) by the American Angus Association.

Notice of November 11, 2015 - Genetic Condition Update – A genetic condition, Oculocutaneous Hypopigmentation, previously identified in the 1980s as HI (or “White Eye”) in Angus cattle, was recently identified in the Simmental breed by the University of Illinois. For more detailed information on the genetic condition, click here. For the Board’s action and policy, click here.