Anger is mounting in South Africa over new athletics rules prescribing maximum testosterone levels in female competitors widely seen as targeting the country's Olympic champion Caster Semenya.
Her backers at home and abroad have denounced the International Association of Athletics Federations' (IAAF) new policies that target women who naturally produce unusually high levels of testosterone of being "sexist", "racist", "homophobic", "dehumanising" and "humiliating".
From November 1, athletes classified as "hyper-androginous" will have to chemically lower their testosterone levels to just 5 nanomoles per litre of blood to be eligible to run any international race of 400 metres up to the mile.
The IAAF has defended the rule change as scientifically sound.
According to a study financed by the IAAF, high testosterone levels in some athletes gives them a "significant" advantage in certain competitions.
The first athlete to be affected by the change is double Olympic 800 metres champion Semenya -- who also runs the 1,500 metres.
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The IAAF insists that the new rules "are about levelling the playing field to ensure fair and meaningful competition in the sport".
"The regulations are solely to ensure fair and meaningful competition within the female classification for the benefit of the broad class of female athletes," said the IAAF in a statement.
But the decision has provoked an explosion of anger.
South African law professor Steve Cornelius described it as "ostracising certain individuals, all of them female, for no reason other than being what they were born to be" in a stinging letter resigning from the IAAF's disciplinary tribunal.
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- 'The science is not conclusive' -
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Bartoletta suggested the IAAF could have acted more fairly if it had contacted "all of its participating elite females for a snapshot of their hormone panels."
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