Olympic Women Athletes Must Undergo Genetic Testing for 2028 Los Angeles Games

The International Olympic Committee has imposed a new eligibility framework for women's competitions that will require athletes to pass a genetic sex verification test before competing in female categories at the 2028 Los Angeles Olympics and beyond. The policy, announced on Thursday, mandates a one-time SRY gene test and marks a decisive shift toward biological sex as the determinant for participation in women's events.

Why This Matters:

• Testing requirement: Athletes must undergo SRY gene screening via saliva swab or blood sample to compete in women's Olympic categories.

• Permanent determination: A negative SRY result qualifies an athlete for life; no repeat testing unless validity is questioned.

• Transgender athletes: Those testing positive for the SRY gene remain eligible for men's, mixed, or open competition categories.

The Science Behind the Decision

The IOC's new framework centers on the SRY gene, found on the Y chromosome, which triggers male sexual development. Athletes testing negative for this gene will be permanently cleared to compete in women's events without further verification. The Committee describes the screening methods—saliva swab or blood draw—as minimally invasive and routine.

Kirsty Coventry, the IOC president and former Olympic swimmer, defended the policy as grounded in medical expertise and fairness. "In the Olympic Games, even the smallest margins can make the difference between victory and defeat," she stated. "It is absolutely clear that it would not be fair for individuals of biological male sex to compete in the female category. Moreover, in some sports, such a situation could even be unsafe."

Coventry emphasized that athletes will face verification only once in their lifetime, with clear explanations of the process, access to counseling support, and specialized medical guidance. The IOC insists the measure upholds both competitive equity and athlete dignity.

What This Means for Athletes

Under the new rules, any competitor wishing to enter women's individual or team events at future Olympics must present a negative SRY gene result. Athletes who test positive—including XY transgender athletes and those with androgen-sensitive differences of sex development (DSD)—retain full eligibility for men's categories, mixed-gender slots, and open or non-sex-differentiated competitions.

The policy applies universally across all Olympic sports, from track and field to combat disciplines. The IOC argues that biological male sex confers performance advantages in every event relying on strength, power, or endurance, making sex-based categories essential for fairness and safety, particularly in contact sports.

The framework was developed over 18 months, from September 2024 to March 2026, by a working group that reviewed the latest scientific evidence and updates since the Committee's previous guidelines in 2021. The resulting consensus determined that biological sex should serve as the definitive criterion for female category eligibility.

Impact on International Sport Governance

The IOC has called on International Federations, National Olympic Committees, National Federations, and Continental Associations to adopt this policy across their jurisdictions. This sets a global standard that will ripple through national and regional sports governance structures, potentially influencing eligibility rules far beyond the Olympic stage.

For Portugal's sports authorities, this means the Comité Olímpico de Portugal and national federations will likely align their domestic eligibility criteria with the IOC framework. Portuguese athletes aiming for Olympic qualification will need to navigate these requirements well before the 2028 Games, with SRY testing becoming a standard step in the credentialing process.

The policy also affects Portuguese sports medicine and anti-doping infrastructure, which will need to implement standardized testing protocols, ensure athlete confidentiality, and provide the counseling and medical support the IOC mandates.

The Broader Context

The IOC's announcement follows years of contested debate over transgender inclusion in elite sport, with various federations adopting differing approaches. Some governing bodies, particularly in athletics and swimming, had already moved toward stricter eligibility rules based on testosterone levels or pubertal development. The new Olympic policy goes further by anchoring eligibility exclusively in genetic sex, bypassing hormone thresholds or transition timelines.

The Committee framed the change as essential to preserving the "universally accepted principle" that a separate female category is necessary to ensure equitable access to elite sport for women. The policy aims to guarantee equal opportunities for female athletes on podiums and in finals, maintain the presence of women's events across all Olympic disciplines, and celebrate female achievement as a source of inspiration for women and girls worldwide.

Critics of such policies argue they risk excluding athletes with intersex variations or creating invasive verification processes. However, the IOC contends that its one-time testing model, combined with counseling and medical support, strikes a balance between inclusivity and competitive fairness.

Implementation Timeline

The policy takes effect for the Los Angeles 2028 Olympics, giving athletes, federations, and national committees roughly two years to adapt. The IOC has not specified how testing will be administered during qualification cycles, but athletes will likely need to complete verification before competing in Olympic trials or qualification events.

For Portugal-based athletes and coaches, this means incorporating SRY testing into training and competition planning well ahead of 2028. National federations will need to establish clear pathways for athletes to access testing, understand their results, and receive support if questions arise.

The policy also raises logistical questions for Continental Games, World Championships, and other qualifying tournaments. If international federations adopt the IOC framework, SRY testing could become a prerequisite for competition at multiple levels, not just the Olympics.

What Comes Next

The IOC has signaled that this policy is designed to provide clarity and consistency across all Olympic sports, ending years of fragmented approaches by individual federations. Whether other major sporting bodies—such as FIFA, World Athletics, or the International Swimming Federation—follow suit remains to be seen, but the Olympic imprimatur carries significant weight in global sports governance.

For now, the message from the IOC is unambiguous: biological sex, as determined by the SRY gene, will define eligibility for women's Olympic competition starting in 2028. Athletes, federations, and national committees worldwide must prepare for a new era of sex-based verification in elite sport.