I recently (sometime last year) read a book arguing that there were at least seven ways to physically sex a human and that the methods were often prone to disagreement (for instance a testosterone insensitive person might be physically indistinguishable from other women by most tests but genetically male).

And while people seem comfortable assuming that men can always beat women in physical competitions, public information on intersexed athletes does not appear to bear out the idea that these people have some sort of undue advantage.

Of course, historically there have been a few cases of men choosing (or being ordered) to masquerade as women in order to compete. I guess as long as we’re separating the sexes for competitions attempts to detect these people are reasonable.

http://snurl.com/qlqkq