Well, the question was posed by a platinum member, and even answered DIRECTLY by George Spellwin... and other members chimed in with some very unique ways to get around these testing methods...
Without giving away the plot... I can say there are many factors that can influence detection time... including: Metabolism, fluid intake, your body's tolerance to the drug, how frequently you took it, how LONG you took it, your body fat percentage, the relevant potency of the anabolic you took, and in some cases... the dosage.
C-ditty