Athletes and the elusive definition of sex
http://tinarussell.wordpress.com/2008/07/30/athletes-and-the-elusive-definition-of-sex/Tina Russell
7/30/2008
I can't say I know what the correct solution is for the entirely unlikely problem of whether a country would enter a man disguised as a woman into an international competition (though I would imagine the likelihood of the information coming out, and the country's subsequent humiliation, would be sufficient deterrent). Perhaps a more likely problem would be coaches, looking for a less obvious way to cheat, would use male hormones instead of steroids as the drug of choice to tell players to take and not to ask questions about. However, then you would want to have a look at recent medical history, as male hormones have fairly obvious effects over time.
