@vivariumvivariumsvivaria
Ethics of Y chromosomes in female sport aside - how is it fair that CeCe Telfer is excluded by a WA rule that is different from the IOC rule?
To compete in Olympic track and field events, competitors have to qualify during competitions organised or approved by World Athletics. WA (formerly IAAF) has set its own regulations.
I think previously the IAAF did use the 10 nmol/l figure, but then revised it down because of the prevalence of DSD athletes in middle distance events, and because higher levels of testosterone enhance performance at those middle distance events.