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What do scientists tell us about boxing's gender row?
Research is shedding light on different chromosomal make-ups and what advantages they may bring to sport.
The most famous example is Caster Semenya - a double Olympic gold medallist and three-time world champion over 800m, though Prof Alun Williams says there is not direct evidence that DSD athletes have the same advantage as typical males. “The most recent woman we diagnosed with having XY chromosomes was 33,” says Claus Højbjerg Gravholt - an endocrinology professor at Aarhus University who spent the past 30 years dealing with DSD. Dr Heffernan says that there aren’t enough known and studied athletes with a DSD to make a valid scientific conclusion as to whether they definitely have an advantage, and as to whether they should be eligible or ineligible to compete in the female category.
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