Lots of talk gain about sport, Olympics and gender. So a little history, Ewa Kłobukowska a Polish sprinter, was banned from the Olympics and stripped of her medals.
Why? She failed a visual inspection of her genetalia and then failed a chromosome test. She would today have been immediately called a man and no doubt the press would have had a field day.
The next year she gave birth.... This was one of the reasons the Olympics stopped using chromosome testing because it's inaccurate and wrong.