Testicular failure is the inability of the testicles to produce sperm or male hormones.
See also:
Testicular failure is uncommon. Causes include:
The following things increase the risk for testicular failure:
Bhasin S, Cunningham GR, Hayes FJ, et al. Testosterone therapy in adult men with androgen deficiency syndromes: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2006 Jun;91(6):1995-2010.