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Caster Semenya
CASTER SEMENYA, ATHLETICS: After her spectacular gold medal-winning performance in the women's 800m at last week's athletics world championships, the 18-year-old South African was forced to undergo gender verification tests. Concerns were raised because of her deep voice, masculine physique and dramatically improved performances. According to medical experts, Semenya may suffer from a rare condition that means she has female organs but male chromosomes.

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