International Olympic Committee president Thomas Bach says he has a "lot of sympathy" for runner Caster Semenya.
South Africa's multiple Olympic and world champion lost her legal case against athletics' world governing body, the IAAF this week.
Semenya had challenged IAAF rules designed to limit testosterone levels in female runners but the Court of Arbitration for Sport (Cas) rejected her appeal.
Bach says he "respects" the decision.
To compete against women, Semenya will have to take medication to reduce testosterone or move up in distance to races over a mile long.

Red Bull consultant Marko to leave F1 team
Dubai Basketball continues strong form across Europe
Fabrizio Romano reflects on independent media’s impact at BRIDGE
Desert Vipers down Gulf Giants to secure win in Super Over thriller
Fernandes double helps Man United to win as Wolves' misery continues
