Conditional on a consensus 20 years from now that sperm count has been declining, what will scientists believe was the most important factor?
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Related questions for context, not a comparison of equivalent contracts.
In twenty years, will the best evidence show very substantial (>one quarter) declines in fertility rate (relative to couples trying equally hard to conceive in the past) due to decreasing sperm count, in at least one country?
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Related ACX post Declining Sperm Count: Much More Than You Wanted To Know.
- I will go off of some combination of how sure scientists are that it matters, vs. how big scientists think the effect is.
