The World 800 metres champion South African Caster Semenya, who is returning to competition after controversial gender tests put her career on hold, will not compete in the world junior championships in Canada but might run in the African championships later in July.
Semenya, who was cleared to compete as a woman earlier this week, has not run competitively since undergoing tests at the Berlin world championships last August.
Semenya sprang to prominence last year with her rapid improvement over 800 metres.
Her winning time in Berlin of one minute 55.45 seconds was the fastest of 2009.
The African Athletics Championships start in Nairobi on July the 28th.