That's exactly what I was going to say.
Competitively its unfair, thats a simple fact of life and perhaps a skeleton in the closet but it's unfair not just because of the advantages they have physically but because it's unfair that female to male transgender athletes are at a disadvantage in their chosen gender of races. Why should one TG have competitive advantage over another?

The only answer to this is to have races for TG athletes m to F and F to M. Problem solved, everyone happy. I really don't buy into this testosterone measuring nonsense but I also see the need for equal opportunities.

On a similar vein, I would never have let the South African Sprinter Oscar Pistorius compete.