im at about 10 weeks now of tren only (40mg ed)...not shut down yet...had to run off a batch today & all my equipment worked perfectly...nuts are still pretty much normal size too... starting 4 weeks of t-3 and clen now & dont wanna lose too much muscle, so im gonna keep the tren go'n for the same 4 weeks (14 total)
fyi - at 6 weeks of tren on my first cycle ever, my buddy had told me tren will shut me down hard (cuz i didnt run test with it)...no sooner had he said that....I noticed i couldn't get a woody...even look,n at porn !! i freeked, quit the tren & started clomid & nolv asap... things started gradually work'n again...
here's the thing tho (at least for me)... i think it was all in my brain...when you worry about impotence, you cant get a woody.... i dont worry about it anymore & everything works fine....even at 10 weeks... I wouldnt push my theory to far tho.... and of course im only run'n a light dose (40ed) i only weigh 180.... i check my equipment weekly...if i notice a sudden change, i'll know i hit my threshold & make a note of it... good luck !!