MFA:

That data, which also compared trans women with men, contradicted a broad claim often made by proponents of rules that bar transgender women from competing in women's sports. It also led the study's authors to caution against a rush to expand such policies, which already bar transgender athletes from a handful of Olympic sports.

The authors cautioned against the presumption of immutable and disproportionate advantages for transgender female athletes who compete in women's sports, and they advised against "precautionary bans and sport eligibility exclusions" that were not based on sport-specific research.