According to The Independent, The IAAF has asked the Swiss Federal Tribunal to overturn the temporary ruling allowing Caster Semenya to compete internationally in the 800m without taking hormone suppressants.
In the wake of Semenya’s appeal to the Swiss court over the decision to uphold the IAAF’s testosterone rule whereby female 46XY DSD athletes with high testosterone who wish to race distances between the 400m and the mile must lower their testosterone to a maximum of 5 nmol/L, the Swiss court decided that Semenya (but no other affected athletes) could continue to race her chosen distance without lowering her testosterone while the court was hearing her appeal.
DSD refers to differences of sexual development, and 46XY DSD to a specific difference in which someone is born female but has a Y chromosome, and this condition is usually accompanied by natural testosterone levels in the male range. Semenya, along with several other athletes, is believed to be 46 XY DSD.
Semenya will race the 800m in the Prefontaine Classic in California on Sunday. The full field has not been released. The Pre Classic is a Diamond League event and is not run by the IAAF.