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.

World Sports Summit opens Monday with top international sportspersons, experts
Curator 'shocked' by Melbourne pitch performance in Ashes
MI Emirates seal Qualifier 1 berth after eight-wicket win over Dubai Capitals
Nigeria let three goal lead slip before edging past Tunisia
England survive mayhem to claim Melbourne Ashes win
