JOHANNESBURG (Reuters) - Double Olympic champion Caster Semenya, who has been locked in a battle over her testosterone levels with athletics authorities, said on Wednesday that she has not felt supported by other women in sport. South African athlete Caster Semenya, who is fighting an IAAF regulation that would require her to take testosterone-lowering medication to defend her 800-metre title at the World Championships in September, speaks at a women's conference in Johannesburg, South Africa August 14 2019. REUTERS\/Siphiwe SibekoThe South African athlete will not be able to defend her 800-metres title at the world championships in September after the Swiss Federal Tribunal reversed a ruling that temporarily lifted testosterone regulations imposed on her. \u201cSince I have been in sport I have never really felt very supported, I\u2019ve never felt recognized mostly by women,\u201d said Semenya during a women\u2019s conference in Johannesburg where she was the headline speaker. Semenya is appealing the Court of Arbitration for Sport\u2019s (CAS) ruling that supported regulations introduced by the sport\u2019s governing body, the International Association of Athletics Federations (IAAF). These say that XY chromosome athletes with differences in sexual development (DSDs) can race in distances from 400m to a mile only if they take medication to reach a reduced testosterone level. Despite the IAAF receiving support from some current and former athletes, the decision to reduce testosterone levels in women\u2019s athletics has also attracted criticism from human rights organizations. The United Nations Human Rights Council adopted a resolution in support of Semenya in March. \u201cI think it comes more into the international stage when you see your own rivals come with this... what can I call it... these rude responses in terms of me competing against them,\u201d said Semenya. \u00a0 British runner Lynsey Sharp said in May that she had received death threats for past comments she made about the South African. Semenya, who was greeted by cheers at the conference, said she still saw herself as a middle distance runner. \u201cWhoever is going to stop me from running is going to have to drag me out of the track,\u201d Semenya said. The 28-year-old said she was undecided about whether she would switch to longer distances or pursue a\u00a0career in another sport. \u201cIn terms of changing events I haven\u2019t decide anything about moving up or moving down. I still consider myself a middle distance runner,\u201d Semenya said. Reporting by Tanisha Heiberg; Editing by Christian RadnedgeOur Standards:The Thomson Reuters Trust Principles.