In my case, my husband also suffered from stress, on BP meds, Cholesterol meds, diuretics, and of course this can create an environment of depression which can in fact lower testosterone
production. However, the marked drop mostly occurred post-vasectomy
. I have no numbers to prove this since his T levels were not checked by a physician prior to the vasectomy, I am only going on what I observed from a wife's point of view.