CAS dismisses Semenya appeal over IAAF testosterone regulations

The Court of Arbitration for Sport (CAS) on Wednesday dismissed an appeal by Olympic 800-metres champion Caster Semenya against the introduction of regulations to restrict testosterone levels in female athletes.

The court ruled the regulations were needed for athletes with differences in sexual development (DSDs) to ensure fair competition. The rules cover events ranging from 400-metres to a mile.

The case is likely to have wide-reaching consequences, not just for the future of athletics, but all women’s sport, and has split opinion around the globe.