taking testosterone is known to drop and probably zero out a man's sperm production. it is well known as an effective form of male birth control. . sadly [in] at least 15% or more of men on testosterone replacement the sperm counts do not come back when the testosterone is stopped and the longer you are on it the worse your chances for return of sperm. if future fertility is a concern you should talk to your urologist asap abut stopping the testosterone and looking at other options based on your fsh level and testosterone levels.
if a man is taking progesterone and testosterone replacement what would be the outcome on sperm production?