this post was submitted on 26 Mar 2026
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XX chromosomes are the base requirement. Olympics also tests for elevated testoserone.
"Testosterone is measured for female athletes in the Olympics. The regulations set a limit of 5 nmol/L testosterone for athletes competing in certain events, specifically for distances between 400 meters and 1 mile. Athletes with conditions that cause high testosterone levels may need to suppress their testosterone levels to compete in these events. Additionally, the World Athletics Council has recently reduced the limit to 2.5 nmol/L for athletes with differences in sexual development"
So both conditions, plus others I'd imagine, have to be met.