Testosterone production is mainly contributed by:
Testosterone is a Cl 9 steroid that is synthesized from cholesterol within the interstitial Leydig cells. Ref: Ganong's Review of Medical Physiology, 22nd Edition, Pages 424-25; Good Clinical Practice in Assisted Reproduction By Paul Serhal, Caroline Oveon, 2004, Page 25.
Leydig cells
Seolie cells
Seminiferous tubules
Epididymis