Sineed: The upside to this revelation, though, is Caster will be more likely, I think, to get treatment for her condition than if she continued to live in obscurity in a SA village...
What makes you think she is sick or should be treated out of her intersex condition?
As for South African sports authorities, I wouldn't presume that they follow every female athlete that closely that they know if and when these women have their period. Also, I imagine that periods are sometimes disrupted by the athletes' regimen or stress.
If you read my links, there were questions about Caster for years. And yeah; periods get disrupted by training. But she would never have had a period. At all. Ever. A girl would go to the doctor for that.
Didn't say anything about her being sick; however, undescended testicles inside the body are prone to develop cancer and need to either be removed or, um, properly descended.