South African athlete and Olympic champion, Caster Semenya has lost the court challenge against the International Association of Athletics Federations’ (IAAF) new testosterone rules.

The Court of Arbitration for Sport (CAS) on Wednesday rejected Caster Semenya’s challenge against IAAF rules forcing her to lower her testosterone levels to compete with women, even as judges labelled the regulations “discriminatory.”

The three judge panel found that the rules targeting athletes with differences in sexual development (DSD) were “discriminatory” but that “such discrimination is a necessary, reasonable and proportionate means of achieving the IAAF’s aim of preserving the integrity of female athletics.”

Semenya, along with Athletics South Africa (ASA) had been fighting a highly-publicised case against the IAAF, which seeks to limit natural levels of testosterone in female athletes in the distances that Semenya excels at.

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