IOC Implements SRY Gene Screening for Female Olympic Athletes from 2028, Banning Transgender Women and Some DSD Athletes
The International Olympic Committee (IOC) has announced a new policy requiring a one-time SRY gene screening for all athletes seeking to compete in the female category at the Olympic Games, beginning with the 2028 Los Angeles Summer Games. This policy effectively bans transgender women and some athletes with Differences in Sex Development (DSD) from female Olympic events, aiming to ensure fairness and safety in women's sports.
New SRY Gene Screening Policy
Under the new guidelines, eligibility for the female category will be determined by a one-time SRY (Sex-determining Region Y) gene screening. This test, typically conducted via a cheek swab or saliva sample, aims to detect the presence of the SRY gene, which is typically associated with male sexual development.
The policy is scheduled to take effect from the 2028 Los Angeles Summer Games and will apply to all future Olympic Games, Youth Olympics, and qualifying events. It is designed for elite individual and team sports, and does not apply to grassroots or recreational programs.
The IOC states that the presence of the SRY gene is considered "highly accurate evidence that an athlete has experienced male sex development."
While the policy mentions potential "rare exceptions" for athletes diagnosed with Complete Androgen Insensitivity Syndrome (CAIS) or other DSDs, the process for accessing these exceptions or appealing decisions has not been fully defined.
Rationale and Endorsements
Ensuring Fairness and Safety
IOC President Kirsty Coventry stated that the decision was made to ensure fairness, safety, and integrity in women's sports. She emphasized that it would not be fair for "biological males" to compete in the female category, especially given the slim margins in Olympic competitions.
The IOC's 10-page policy document references scientific evidence suggesting a performance advantage for males, including a 10-12% edge in most running and swimming events, over 20% in throwing and jumping, and potentially more than 100% in explosive power sports. The document notes that XY transgender athletes and athletes with XY-DSD typically have testes and testosterone levels in the male range.
Proponent Arguments
Proponents of the policy describe the SRY test as a reliable, confidential, and proportionate method, claiming it has the backing of sports scientists and a majority of athletes. They also suggest this method is more humane than requiring athletes to suppress testosterone levels and may reduce media scrutiny for some athletes.
International Support
The Australian Olympic Committee (AOC) has endorsed the policy, stating it will provide female athletes with "fairness and certainty." AOC president Ian Chesterman acknowledged the complexity of the subject and emphasized a commitment to empathy and understanding. World Athletics, the international governing body for track and field, also expressed support, stating that protecting women's sport requires a fair playing field where gender does not supersede biology. The charity Sex Matters also voiced support for the decision.
Concerns and Opposition
Critiques from Experts and Advocates
The policy has drawn criticism from human rights groups, LGBTQIA+ advocates, and scientific experts. Professor Andrew Sinclair, who discovered the SRY gene in 1990, has publicly stated his opposition to using the test for determining biological sex in sports. He argues the policy is based on an "overly simplistic idea" that SRY gene presence equates to being male, noting that male sex development is complex and involves multiple genes and hormones.
Sinclair emphasized that the test only indicates the gene's presence, not its function or its impact on the body, and that individuals with DSDs may carry the SRY gene but develop complete or partial female bodies.
Specific Concerns Raised by Critics
Critics have raised several concerns regarding the testing:
- Questions about the reliability, cost, and interpretation of test results, including potential false positives from sample contamination.
- Assertions that the policy invades the privacy of all women and could discriminate against intersex individuals, potentially requiring invasive examinations and additional biomedical testing for appeals.
- Arguments that the policy could deter women who suspect they might not pass the screening from pursuing sports.
- Concerns that the estimated $250 cost per screening could impose a financial burden on athletes and national federations.
- Academics have labeled sex testing as a "backwards step and a harmful anachronism," arguing it violates athletes' human rights and could lead to stigma and psychological distress.
- Legal experts suggest the mandatory testing could contravene the International Covenant on Civil and Political Rights and domestic anti-discrimination laws.
- Advocacy groups warn the policy could create a "chilling effect" on participation due to fear of harassment and "policing girls' bodies," particularly for young athletes.
- The charity Dsdfamilies expressed disappointment, citing concerns about proportionality, potential harm to a vulnerable minority group, and a perceived lack of understanding, dignity, and respect.
Historical Context and Key Cases
A History of Sex Verification
The IOC has a history of sex verification challenges in women's sports spanning over a century, including various examinations and genetic tests. The committee previously used the SRY gene test in the 1980s but discontinued all sex verification tests in 1999 due to scientific criticism, inconclusiveness, significant administrative costs, and concerns about false positives and penalizing natural variations. The current policy represents a shift from the 2021 rules, which had allowed individual international federations to develop their own eligibility guidelines.
Recent Controversies
The discussion around transgender and DSD participation has been prominent in recent years. Notable cases include New Zealand weightlifter Laurel Hubbard, who became the first openly transgender woman to compete in the Olympics in 2021, and DSD athletes such as Caster Semenya, a two-time Olympic 800m champion. The IOC initiated its review after controversies arose during the Paris 2024 Olympic qualifiers regarding the eligibility of boxers Imane Khelif and Lin Yu-ting. Khelif, who identifies as a woman and states she is not transgender, revealed she tested positive for the SRY gene after her eligibility was questioned.
Broader Implications and Outlook
While IOC President Coventry denied any external political influence, some observers have noted that the policy emerges amidst ongoing discussions and legal developments concerning transgender sports participation in the United States and could align with certain US political positions ahead of the Los Angeles Games.
The IOC stated that athletes would be treated with dignity and respect, screened only once in their lifetime, and offered clear education, counseling, and expert medical advice. The AOC also mentioned offering support to athletes affected by the ruling. Potential legal challenges to the policy are anticipated.