http://www.andrologyjournal.org/cgi/reprint/18/4/366.pdfBasically, not all men go to complete stop of sperm production.
It explains the reasons found.
My endocrinologist freaked when I told him I was using TE for male contraceptive.
He had me do several sperm test for count and motility.
Even though I was way over the 200mg/ week TE that worked inthe World Health Organisation male contraceptive study, I was very low count, but not low enough to trust for contraception.
Freakfest mentioned he had a zero level once. I don't know if he meant true zero.
Anyway there are biologic nuances taht make AAS affect us and our recovery to it differently.
This summary is much more simple for those w/ limited knowledge of the terminology
http://jcem.endojournals.org/cgi/content/abstract/81/3/896Oligozoospermia is a defined low level of sperm.
Azoospermia is the absence of sperm.
THis would be better in LInks and studies.