A new urine test designed to catch athletes who take steroids is to be introduced by the World Anti-Doping Agency next year and will be used at the soccer World Cup in Brazil.
Wada called it "the twin" of the blood profiling currently system 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 the new technique would particularly target testosterone and would "complement" the biological passport. It can be used from January 1.
Fifa will be one of the first federations to use it. The world football body said it would be part of its drug testing at next year's World Cup.
"Fifa and Wada will ensure the best possible analysis of urine and blood samples and the proper implementation of the new strategy in the fight against doping by means of the steroid module," Fifa said.
Blood profiling has had success in detecting the use of the blood-boosting drug EPO.