The Best Evidence We've Got Is That It's a Change

A number of studies over the past 15 years or so have all shown that when you analyze sperm counts from men, unselected for their fertility status, sperm counts appear to be lower now than they were in the past. Richard: The best evidence we've got is that it's a change affecting the whole population, not just a subset. Alan: I'm not going to lie, but the moment I opened my report and found out that 98% of my sperm were abnormal,. I was having a bit of a moment.