It's unfair for the individual - it's happened before and people had to give up their careers - but it's also unfair to the other women if an elevated testosterone level helped her develop to the level she's competing at.

Apparently the South African athletic association was aware of it (they already did a test this spring) and they even have an Ex-GDR coach who was involved in steroid doping back in the GDR days, and it is presumed that her testosterone levels were artificially reduced before competitions to evade tests.

By the way (this is really mean but what a coincidence) - her name is an anagram of Yes a secret man...