Trans swimmer Ana Caldas banned, stripped of results after refusing sex test under World Aquatics gender rules
World Aquatics has banned 47-year-old transgender swimmer Ana Caldas until October 2030 and vacated her results from June 2022–October 2024 after she refused mandatory chromosomal and testosterone testing under the federation’s 2022 gender eligibility rules.
- Disciplinary action: Five-year ban through October 2030 and all results from June 2022–October 2024 vacated.
- Cause: Caldas declined chromosomal and testosterone testing required to verify compliance with World Aquatics’ rules.
- Contested meet: Her five gold medals at the 2025 U.S. Masters Swimming Spring Nationals in San Antonio prompted complaints and probes.
- Broader stakes: Case escalates debates on fairness, privacy and the scope of testing at masters and age-group events.
What happened in San Antonio
At the 2025 U.S. Masters Swimming Spring Nationals in San Antonio, Ana Caldas won five gold medals in the women’s 45–49 age group. Her margins and prior competition history prompted formal complaints from competitors and observers, triggering inquiries by event organizers and governing bodies (sources: Swimming World, AOL, Star Observer).
World Aquatics’ rule and the testing demand
World Aquatics revised its gender eligibility policy in 2022, limiting the women’s category to transgender women who transitioned before puberty (generally before age 12 or before Tanner Stage 2). The rule aims to exclude athletes who experienced male puberty from elite female competition. Following complaints, the federation asked Caldas to undergo chromosomal testing and testosterone screening to verify eligibility (sources: AOL, CBS News, Fox News).
Refusal to test and the resulting sanction
Caldas declined the requested tests, characterizing them as invasive, costly and not standard for masters or recreational competitors. She raised concerns about medical privacy and insurance coverage for tests she said were not medically necessary. After her refusal, World Aquatics imposed a five-year ban effective through October 2030 and vacated all her competitive results from June 2022 through October 2024 (source: Star Observer).
“I accepted the ban to protect my bodily autonomy and to avoid forced testing for myself and others,” Caldas said, according to reporting.
Reactions from competitors
Several swimmers who raced Caldas reported feeling surprised and betrayed. Longtime competitor Wendy Enderle told reporters she was upset to learn Caldas was a transgender woman only after the meet. Other athletes and coaches criticized a lack of transparency and inconsistent rules that they say undermine trust at events where participants expect a level playing field (sources: AOL, Fox News).
The Independent Council on Women’s Sports (ICONS) also filed complaints, arguing the integrity of women’s age-group and masters events is at risk.
Legal and regulatory responses
The case attracted legal scrutiny. Texas Attorney General Ken Paxton opened an investigation into U.S. Masters Swimming over potential breaches of state law that restrict transgender participation in women’s sports in certain contexts. At the international level, the Court of Arbitration for Sport (CAS) has upheld World Aquatics’ policy barring most trans women who experienced male puberty from elite women’s competition, a ruling that underpins tighter federation restrictions (sources: Star Observer, Swimming World, CBS News, Athlete Ally).
Testing, privacy and cost concerns
Advocates for transgender athletes say mandatory chromosomal and hormone testing is invasive, stigmatizing and unnecessary for many competitors, particularly at masters and recreational levels. Critics counter that without such verification, federations cannot reliably enforce rules designed to protect fairness in women’s sports. The dispute highlights a tension between medical privacy and the need for enforceable eligibility checks (sources: Star Observer, Fox News).
Broader context: transgender athletes in sports
The Caldas case follows multiple high-profile disputes involving transgender athletes in swimming and other sports. Debate centers on whether trans women who experienced male puberty retain competitive advantages in strength, speed or endurance, and how to reconcile fairness with inclusion. Supporters of stricter limits cite science on puberty’s effects; inclusion advocates emphasize rights, anti-discrimination protections and clear pathways for athletes to compete (sources: CBS News, Athlete Ally, AOL).
Implications for the United States
Sports policy and state law: The case intensifies pressure on national and state governing bodies. States such as Texas already have laws restricting transgender athletes in school sports; the Caldas dispute raises questions about whether those rules or state scrutiny apply at masters-level competitions (sources: Star Observer, Swimming World).
Legal risk and challenges: Federations and event organizers face potential lawsuits from both sides: tests may invite legal challenges over privacy and discrimination, while a failure to enforce rules can prompt complaints about unfairness. The CAS ruling supporting World Aquatics’ limits offers legal cover but doesn’t eliminate conflict at local levels (sources: CBS News, Athlete Ally).
Impact on athletes and events: Masters and age-group sports could see more protests, formal complaints and vetting procedures. Competitors who invest time and fees for events want clear rules and transparency; others caution against singling out or shaming athletes (sources: AOL, Fox News).
Public opinion and politics: The issue is politically charged: conservative audiences are likely to press for stricter rules and testing to protect women’s sports, while more liberal audiences emphasize inclusion and privacy. Cases like Caldas’ are poised to influence policy debates and election-year discussions nationwide.
Reporting notes and sources
This article draws on reporting from Times Media Service and several outlets that covered the Caldas case, World Aquatics’ rule changes, the CAS ruling, competitor reactions, and legal inquiries. Sources include:
