screenshot of Buzzfeed article on sex testing at the Olympics that reads: "In 1968, the International Olympics Commission began testing for sex based on chromosomes — XX for female and XY for male. Before that, so-called "sex impostors" had to undergo demeaning physical inspections in the nude, so the new lab protocols were seen as "simpler, objective and more dignified." But as it turned out, chromosomal testing was not so simple. Exceptions to the rule cropped up all over the place. In 1999, the IOC dropped the requirement, acknowledging that when it comes to sex, things didn't always sort neatly into two piles. "We've known for a long time that the number of elite female athletes with a Y chromosome is about 1 in 420, while in the general population it's 1 in 20,000," Eric Vilain, a medical geneticist who researches disorders of sex development at UCLA, told BuzzFeed News. "So we know there is no strict biological line between men and women. The question is, do we throw our hands in the air?" "
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