Why should intergender/transexuals not be allowed to compete in the world champs or olympics? The discrimination is very unfair as people such as Caster Semanya are human beings like any other track and field athlete.
Track and field at the Olympics/World Champs should be a single "open division" which does not discriminate against any sex. It is the only fair way of doing things. If you run/jump/throw the qualifying standard set by the IAAF/IOC, you should be allowed to compete regardless of your sex. If people are worried about too few people making the standard just make the standard lower and have more qualifying heats and a bigger field in the marathon.