I think I've posted this before, but a good powerlifter friend of mine had a daughter while running 2g test, 1g tren, mast, eq, drol. Not sure of the mast, eq and drol dosages, but I assume a lot.
I remember the test and tren numbers cause he wanted to emphasize that according to broscience he shouldn't ever have gotten his gf pregnant running that much tren.
Just depends on if you're predisposed to completely shutting down sperm production or maybe you have very few very good swimmers? Not sure, but definitely possible to have an accident while on a ton of gear.