In recent years, three designer anabolic agents that have never been marketed have been identified. The first was discovered in 2002 by Catlin, head of the UCLA Analytical Laboratory [37], who detected a potent 19nor anabolic steroid norbolethone the urine of a female cyclist. In 2003, Catlin received a used syringe containing a residual substance tetrahydrogestrinone (THG), which he identified, synthesized by hydrogenation of gestrinone and a developed specific method of detection [38]. THG has been demonstrated to be a highly potent androgen and progestin [39] and several athletes have been sanctioned for its use. As some of these athletes participated at the Sydney Olympic Games, the obvious question was whether THG was used by athletes at the 2000 Games? In 2007, the most successful female track athlete who won five medals including three gold at the Sydney Olympic Games, admitted that she had taken designer steroids since 1999 and returned her medals. Also in 2003, Canadian custom authorities at the USCanadian border seized a quantity of steroids which were identified as desoxy-methyl-testosterone (DMT). Further investigation by Catlin and colleagues [40] and in Germany [41] both of whom termed the substance “madol”, demonstrated DMT to be a potent androgen receptor agonist with anabolic activity and could be detected in urine.