The International Olympic Committee has implemented a landmark policy prohibiting transgender women from participation in all female-category events at Olympic competitions. This sweeping restriction, which extends to both individual and team sports under IOC jurisdiction, establishes new biological criteria for female athletic eligibility.
The newly published ten-page policy document mandates a one-time SRY gene test to determine biological sex, citing this marker as “highly accurate evidence that an athlete has experienced male sex development” that remains fixed throughout life. The policy specifically exempts grassroots and recreational sports programs while applying prospectively from the 2028 Los Angeles Games.
IOC President Kirsty Coventry, who initiated the “protecting the female category” review upon her historic appointment as the first female leader in the organization’s 132-year history, emphasized the policy aims to “protect fairness, safety and integrity in the female category.” The decision aligns with similar measures already adopted by three major Olympic sports—track and field, swimming, and cycling—which previously excluded transgender women who had undergone male puberty.
The scientific rationale detailed in the IOC document identifies three critical testosterone peaks in male development: in utero, during infant mini-puberty, and throughout adolescent puberty into adulthood. These biological factors, the committee asserts, create “individual sex-based performance advantages in sports and events that rely on strength, power and/or endurance” that are retained regardless of gender transition.
The policy also affects athletes with Differences in Sex Development (DSD), such as two-time Olympic champion runner Caster Semenya, further narrowing eligibility parameters for female competition. The move represents a significant shift from the IOC’s previous approach of providing guidance to individual sports governing bodies, establishing instead a unified standard for Olympic competition.