Steroid Testing Steroid Testing How Does It Work?

Steroid Testing how does it work? - steroid testing

I've always thought that use a lot of professional athletes who take steroids. From what I can tell, the use of steroids can be said that they take drugs when they are tested. The athletes could only get steroids out of season and would then, if the test have to leave for a while.
Is that really test how steroids?