ok bros I am going to sound like drb here. In the testicles are cells called leydig cells and these get activated by leutinzing hormone and folicle stimulating hormne. LH and FSH. This causes an abundance of sperm cells in the testosterone that is produced in the testicles. When you gear up ,you turn this natural test production either way down, or somewhat. In some men it only gets turned off to about 50%. So when your gear shuts down your natty test it is also shuting down SOME sperm production..BUT that does not necessarliy mean 100%. Most men DO NOT get total 100% shutdown. Therefore...yes you still have sperm avaliable to chase down the eggs with the X and Y's. Now of course we know that your sperm count will be diminished to some degree but we never know by how much. Key point--sperm cells are delivered into your natty test.
When I heard dad preaching no aas until 25 I asked what is the point, and why did you do as a first cycle 5 months of dbol with no problem? Answer-My test don't shutdown easy and never has.Therefore he never even used pct when it did become available. So my dad had 5 boys...means his x was shutdown...lol. OR is it his combo of test/deca/tuna stack? No it was just him...and I think we can all come to feel for ourselves when we lay off a cycle how we feel. I feel fine coming off and I am a super tren fan. I also conceived 3 children while juiced pretty heavily.
Keep in mind .. how fertile or sterile you are has nothing to do with the size of the wad. The wad juice is made in the prostate and this is not regulated by test.