Spermatogenesis occurs at:
Spermatogenesis requires a temperature considerably lower than that of the interior of the body. Ref: Ganong's Review of Medical Physiology, 22nd Edition, Page 427; Guyton and Hall - Textbook of Medical Physiology, 10th Edition, Page 920
Body temperature
Temperature lower than core body temperature
Temperature higher than core body temperature
Temperature does not play a role