IOC announced a controversial policy requiring all athletes competing in women's Olympic categories to undergo SRY gene screening beginning in 2028. The test, which detects the sex-determining region Y gene via saliva, cheek swab, or blood, will determine eligibility for the female division. Athletes testing negative for SRY will permanently qualify for women's events, while those testing positive will be excluded.

The move replaces a patchwork of federation-level rules with a universal approach, affecting sports like athletics, swimming, and boxing. Caster Semenya, a two-time Olympic 800m champion with DSD, exemplifies the policy's impact, as her eligibility previously hinged on testosterone suppression. Critics argue the test is invasive and reductive, while supporters claim it ensures fairness in strength-based competitions.