I Learned Something new about Sex

Essay - Where’s the Rulebook for Sex Verification? - NYTimes.com: "To be fair, the biology of sex is a lot more complicated than the average fan believes. Many think you can simply look at a person’s “sex chromosomes.” If the person has XY chromosomes, you declare him a man. If XX, she’s a woman. Right? Wrong. A little biology: On the Y chromosome, a gene called SRY usually makes a fetus grow as a male. It turns out, though, that SRY can show up on an X, turning an XX fetus essentially male. And if the SRY gene does not work on the Y, the fetus develops essentially female."

I still think they could have been a little more discrete and performed a sex verification a little more quitely. The problem is that according to this article it might not be possible to say anything conclusively about the sex of Caster Semenya, which makes prescreening of all athletes non-interesting. This again speak for a little more discretion.