Men's sperm count worldwide decreased by 50% in the last 50 years - study
A new study examined trends in sperm count among men in every continent and found a significant decrease.
Human sperm stained for semen quality testing in a clinical laboratory.(photo credit: BOBJGALINDO/CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)/VIA WIKIMEDIA COMMONS)