I realize this is an older post, but people like me are actually looking for information on this subject and this post does come up, so I'd like to add my two cents.
Me and my wife are also having fertility issues. We went to a fertility specialist in the hospital. Of course I had my sperm analyzed.
My first test was done after a period of repeated diaper wearing. I wear during the day, not during the night. I don't wear all days, possibly 3 or 4 days a week.
instead of the normal hundreds of millions of cells, it was now down to several ten thousands. Of course only one is needed, but chances of getting pregnant with these numbers are close to zero.
since sperm is taking three