It's clear that people will continue to live longer and that birth rates will continue to fall, either by necessity (overpopulation) or due to factors like this. I hold the view that far too many people unnecessarily have children due to societal norms, family pressure, a bizarre and slightly narcissistic desire to have their genes passed down to future generations (adoption is incredibly important.) Obviously I'm not saying having children is wrong, just far too many people see it as a necessary part of their life when it really shouldn't be. Having children is an inherently selfish decision and unless you're prepared to sacrifice a huge amount of freedom to afford your children the best upbringing, then maybe having children isn't for you.
Maybe I have too much faith in modern medicine (I doubt it, modern medicine is incredible) but I fully believe a trend of dropping sperm count is not apocalyptic. It'll probably result in benefits such as fewer undesired pregnancies. The important thing is to ensure that people of any economic status have access to fertility clinics, and for IVF and related procedures to not be cost prohibitive for non-wealthy people.