I actually perform 2-3 semen analysis or Post Vas tests a day. something that was literally tossed in my lap a few months ago and I had previous experience and the certifications to perform it.
what I am seeing as a trend, is lower ejaculatory volume and decreased counts and motility on many in a very wide range of ages ( say 29-55)and various ethnic backgrounds. I never see the men. all I have to go by is the samples.
here is what I think has happened. weight issues, nutrition, fast food, alcohol, shitty caffeine drinks and other food issues, combined with alot of men just don't stay hydrated correctly are the major players.
I do believe that TrT treatments can be detrimental in these issues as well, but I don't know the full effect.
the clot shot is also suspect.
it is very well known to have fertility issues with females in numerous ways and I see no reason for it not to affect males as well.
feel free to PM me and I'll see if I can answer.