Athlete Caster Semenya loses testosterone case

Sports governing bodies usually try to stop athletes taking drugs. But a landmark ruling today means that double Olympic 800 metre gold medallist, Caster Semenya, will have to take medication if she wants to continue to run at that distance at international events.

In a landmark ruling, the Court of Arbitration for Sport decided that the athletics governing body IAAF was right to limit naturally-occurring testosterone levels in female athletes.

What does this mean for men and women in sport?