The most fertile and NaturalLawy places have the LOWEST sperm counts. Among US studies, NYC consistently shows the highest sperm counts and Southern states the lowest.
Compare with the info that I cited earlier from a Pew survey of religions.
It's a strong negative correlation.
Birth rate certainly doesn't DEPEND on sperm count, and seems to be INVERSELY correlated. Why? (Plausible but unproven answer: Because 50 million per cubic centimeter is still WAY more than enough to insure that one of the 50 million gets through to the egg.)
Conclusion: We SHOULD be worrying about the intentional suicide of Western countries that have turned against Natural Law, but we SHOULDN'T be using sperm count as a proxy for birth rates. Sperm count is an unimportant variable.
The current icon shows Polistra using a Personal Equation Machine.