Stem cell doping
Stem cell doping is the postulated practice of enhancing athletic performance through various beneficial effects of stem cells injected into the bloodstream or otherwise introduced into the body. Currently there are no documented cases of stem cell doping, but there are suspicions that the practice may already be emerging.  
- "Beijing Olympics: cell doping already a reality". Agence France-Presse. 2008. Retrieved 2008-08-07.
- "Gene doping at the Olympics: be afraid, be very afraid". Steroid Nation. 2008. Retrieved 2008-08-07.