Well oh saw the fs the other day who told him that the testosterone may be doing his sperm count mre bad than good... The urologist originally put him on testosterone as he said his low testosterone could mean his low sperm count... Now I am so worried! He done his sa yesterday now we are left waiting ad he had to stop taking the testosterone for a week and then do the sa! Anyone have any experience with this??? I'm worrying so bad! We have enough problems without this adding to it also! I found this article after the fs told me- Some of that story is true. But for men also hoping to father children, there may be some vital information missing. Using testosterone supplements can most likely cause a man's sperm count to plummet, often to zero. Getting it back can be costly and take years. Among heavy steroid users, it may never return. Even in the medical community, the effects of testosterone on a man's ability to reproduce are often misunderstood. Several top fertility experts say they often see patients whose regular doctors have placed them on testosterone replacement therapy to treat various ailments - often successfully - without explaining that it might also make them infertile. When artificial testosterone is introduced into the body, the pituitary gland in the brain senses its presence and shuts off the supply of hormones that stimulate the testicles to make their own testosterone and sperm. The brain cannot differentiate natural testosterone from synthetic, so it shuts down its own sperm-making mechanisms. If his sperm count is affected I will be going mad! I am so worried!