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The Conversation
Ari Berkowitz, Presidential Professor and Graduate Liaison for biology programs; Director, Cellular & Behavioral Neurobiology Graduate Program, University of Oklahoma

Sex test used in IOC’s new transgender ban more likely to exclude from Olympics intersex women who were assigned female at birth

Sex testing in elite sports has had a long, inconsistent history. anton5146/iStock via Getty Images Plus

The International Olympic Committee announced a new policy on March 26, 2026, for women’s competitions: Every athlete must be tested for a gene called SRY, usually found on the Y chromosome. Males typically have a Y chromosome and females typically don’t, so the IOC says this requirement will exclude “biological males.” This announcement comes as planning for the 2028 Summer Olympics, hosted in Los Angeles, is underway.

But the IOC statement hides the complexity of biological sex and continues the organization’s century of what the record shows is inconsistent and biologically unsound sports policies.

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