This is an image of Caster Semenya in a race. Pretty easy to see the differences even among a field of highly trained world class athletes.
She is XY intersex. Someone who is different and not easy to categorize among the strict division of male and female athletes. Tough call to make "fair." Born not XX but XY intersex makes her ridiculously dominant as a woman athlete in a speed or power sport. Should they ban her from competing or make her compete with a lowered (and therefore somewhat more equal) T level? By the way, she is not the only XY intersex competing in the 800 over the past few years.
angela