Caster Semenya won a temporary victory in her fight against a new track federation rule after the Federal Supreme Court of Switzerland ordered Monday the rule be immediately suspended. The International Association of Athletics Federation has until later this month to respond about the rule, which would force Semenya to take hormone-altering medication if she wants to continue racing. In the meantime, Semenya may continue to race pending the Swiss court’s final decision. The IAAF wants to regulate the participation of Semenya and other female athletes who have “differences of sexual development,” or DSD, meaning they have naturally occurring testosterone levels beyond the normal female range.