Considering the trend is apparent in data from the 1970's through 2011 (during which time there were zero covid vaccines administered), it is unlikely covid vaccines are relevant.
Even if covid vaccines did have an impact on fertility (and I'm not aware of any data to support this), the data we have clearly shows something else going on.
Well the article doesn't mention covid or the vaccine, it talks about lowering sperm counts as a multi decade incident. Although I have heard reports that either the vaccine or getting covid can impact sperm count
