Traditional urine analysis does not detect doping with HGH, so the ban was unenforceable until the early 2000s, when blood tests that could distinguish between natural and artificial HGH were starting to be developed.
Traditionelle analyser af urinprøver kunne ikke påvise doping med HGH, så forbuddet kunne ikke håndhæves indtil begyndelsen af 2000'erne, da udviklingen af blodprøvetests som kunne skelne naturlig HGH fra kunstig HGH påbegyndtes.