WADA President John Fahey revealed the steroid passport as a new resource to help catch dopers.
Alexander Joe/AFP/Getty Images

JOHANNESBURG (AP) -- The World Anti-Doping Agency will introduce a new technique for urine tests from next year that is aimed at catching athletes who take steroids.

WADA called it ''the twin'' of the blood profiling system currently used in the athletes' biological passport system. It will allow anti-doping authorities to build a profile of a person's steroid levels from urine samples and to identify any changes in a similar way that changes in blood may indicate doping.

WADA said Tuesday the new technique will particularly target testosterone and will ''complement'' the biological passport. It can be used from Jan. 1, WADA President John Fahey said, announcing the introduction of the ''steroidal module'' at the World Conference on Doping in Sport in South Africa.

The steroid technique had been developed alongside the current blood module but then fell behind, Fahey said. Blood profiling has been in use since 2008.

Blood profiling has had success in detecting the use of the blood-boosting drug EPO and led to the banning of a number of cyclists. It is currently used by around 35 sports, WADA says.

WADA has also developed a mobile App that allows athletes to give their whereabouts to anti-doping agencies through their cellphones or other devices so they don't miss out-of-competition tests. The new App will be available from next month.

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