Another (old) method that is known to work is injecting low levels (say TRT levels or slightly less) which shutdowns endogenous testosterone production which al

Another (old) method that is known to work is injecting low levels (say TRT levels or slightly less) which shutdowns endogenous testosterone production which also shuts down sperm production. This gets you @ next to zero sperm levels but also keeps testosterone in your body. This is by far the cheapest and effective method i have seen. The only reason I can see it is not in use is due to the FUD around recreational use of steriods.