BBC Sport
[Source: BBC]
Athletes who want to compete in the female category for world ranking competitions from September will have to take a one-time gene test, says governing body World Athletics.
The new regulations come into effect from 1 September, external and will be applied to the World Athletics Championships, which take place from 13-21 September in Tokyo.
The test for the SRY gene – which is part of the Y chromosome and causes male characteristics to develop – can be conducted via a cheek swab or blood test.
If the test is negative for the Y chromosome, the athlete is eligible to compete in the female category.
If it is positive, they can compete in the female category in non-world ranking competitions or in another category other than the female one.
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