Can Biological Men Compete in Women’s Sports? Here’s What the Rules Actually Say

What do the rules actually say?

The NCAA currently prohibits athletes it classifies as male at birth from competing on women’s teams. Its policy applies across NCAA competition and states that no waiver is available for that restriction.

In June 2026, the U.S. Supreme Court held in West Virginia v. B.P.J. that Title IX permits schools to maintain separate men’s and women’s teams defined by biological sex, and that West Virginia and Idaho did not violate the Equal Protection Clause by maintaining female teams for biological females.

International sport is moving in the same direction.

World Athletics requires specified athletes competing in the female category to provide a one-time SRY test result. That testing requirement continues across major events in 2026.

The Women’s Tennis Association has also begun implementing one-time SRY genetic testing for female-category eligibility, replacing its previous testosterone-based approach.

These policies are not identical. But they reveal something important: the debate is moving from “does biological sex matter?” toward “how should a protected female category be defined and administered?”

That is a much more serious institutional question.

A rule is only the beginning

Saying that biological males are not eligible for the women’s category does not finish the job.

A professional sports organization still has to answer: Who establishes the standard? What evidence verifies eligibility? Who sees that evidence? How is medical privacy protected? What happens in an exceptional biological case? Is there an appeal? Can the standard change halfway through a season? What happens when an athlete does not qualify for the women’s category?

If those answers do not exist before controversy arrives, the athlete becomes the battleground. That is poor institutional design.

DAO Sports intends to establish the architecture first.

Protecting women’s competition does not require pretending everyone else disappears

This is where much of the current debate stops too early.

One side argues that the women’s category must remain protected. Another asks what happens to transgender and gender-expansive athletes if they are not eligible for that category.

Both questions deserve an answer. DAO Sports is building one.

The Women’s Division exists as protected female competition. The Phoenix Division™ exists as a distinct competitive pathway for transgender and gender-expansive athletes, with its own eligibility structure and equal institutional standing.

That means we do not have to choose between protecting women and telling another group of athletes that sport has no place for them. We can build another place.

That is the difference between arguing about categories and designing them.

Verification should not become public exposure

Eligibility also creates a privacy problem.

Athletes should not have to publish medical records or biological information to satisfy public curiosity.

DAO Sports is developing ZK-AEP — the Zero-Knowledge Athletic Eligibility Protocol around a different idea: prove that an athlete satisfies the required eligibility standard without unnecessarily exposing the underlying private information.

That is where blockchain and zero-knowledge technology can become genuinely useful in sport. Not to decide who is male or female. Not to create the eligibility rule. To help prove that an established process was followed while protecting sensitive information.

The question is changing

For years, the argument was framed as whether sports should recognize biological differences at all. Increasingly, governing bodies and courts are answering that question.

The harder work comes next: How do you protect female competition? How do you verify eligibility fairly? How do you protect privacy? How do you create an appeals process? And what meaningful competitive pathway exists for athletes outside the female category?

DAO Sports is not waiting for those questions to become crises. We are designing for them now.

Protecting women’s sports is only half the solution. The other half is building somewhere legitimate for everyone else to compete.