A major controversy has emerged in masters swimming after transgender athlete Hannah Caldas reportedly received a five-year ban from World Aquatics. The decision, announced in October 2025, is said to have disqualified her results from June 2022 through October 2024, including a gold medal in the women’s 100-meter freestyle at the 2024 World Aquatics Masters Championships in Doha.

Caldas, a 48-year-old Portuguese-American swimmer who has competed in women’s events since 2009, reportedly refused a chromosomal test requested to establish her eligibility under World Aquatics’ gender policy. Introduced in 2022, the policy generally restricts transgender women who experienced male puberty from competing in elite women’s categories, subject to its eligibility criteria.

The dispute intensified after Caldas won five events in the women’s 45–49 age group at the 2025 U.S. Masters Swimming Spring Nationals. Her participation drew criticism, including from Texas Attorney General Ken Paxton, and prompted scrutiny of her eligibility.

U.S. Masters Swimming reportedly cleared Caldas after reviewing documentation, while World Aquatics sought additional evidence under its own rules. The conflicting decisions brought attention to the different standards governing eligibility across swimming organizations.

Beyond medals and records, the case raises difficult questions about fairness in competition, privacy, and how sporting bodies determine eligibility. For Caldas, the reported demand to prove her gender has made the dispute deeply personal—and the wider debate is far from settled.