Olympic 800m champion Caster Semenya has had an appeal dismissed by the Court of Arbitration for Sport to halt the introduction of regulations to limit testosterone in female athletes with differences in sexual development. It means that Semenya and other affected athletes hoping to compete at the World Championships in September would have to start taking medication to lower their testosterone level.

from Times of India https://timesofindia.indiatimes.com/sports/more-sports/athletics/cas-dismisses-semenya-appeal-over-iaaf-testosterone-regulations/articleshow/69129186.cms