Semenya's gender tested unknown to her mother

http://www.thaindian.com/newsportal/sports/semenyas-gender-tested-unknown-to-her-mother_100246834.html
9/13/09

"I don't care about what they say she is, because I am her mother. But what makes me even more angry is that as the parents we were not even informed she was going to be tested," Semenya said.

"The way they acted is like thieves who just break into your house and do whatever they want," she accused, adding: "What is even more heartbreaking is that my child said she was not told anything about the tests."

Semenia is 18.
I'm not sure at what age she becomes an adult, but I would bet its around that time.
Also, as mentioned before, at this level of competition it is understood that if there is questions you can be tested.