The big bodybuilding federations don't test their athletes for doping at all, and don't even claim their athletes to be drug free. Some smaller so-called natural bodybuilding federations claim their athletes to be drug free, but don't have the financial resources to do any significant doping testing. Sometimes a limited number of athletes are urine tested during a big contest, but for off-season testing there is certainly no money, as a single urine test costs several hundreds of dollars, and a more advanced blood test cost a multiple of this.
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Tetrahydrogestrinone (THG) - Commonly known as The Clear, Tetrahydrogestrinone (THG is a type of steroid that had only been recently placed into scheduling as of 2005 and is noted unapproved by FDA. It basically binds with the androgen receptor instead of estrogen which makes it effective in increasing endurance for athletes. According to history, this was the secret of winning for the gold medalist Marion Jones, a sprinter athlete. However, longer association with this type of steroid can lead to infertility in both male and female. Using the steroids abuse test kit, a person may be held liable for a positive THG steroid test.