From BBC.com:
Analysis prior to the World Athletics Championships and the 18-year-old’s big improvement prompted calls for a gender test from the sport’s governing body.
It was made public only hours before the South African, who has been backed by her nation, won the 800m in Berlin.
A high level of the hormone does not always equate to a failed drugs test.
But the news will only increase speculation surrounding Semenya, who arrived back in South Africa to a rapturous welcome on Tuesday.
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