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Where Have All the Swimmers Gone?

September 25, 2017

Sperm counts in men in Western countries have dropped by more than 50% in the last 40 years. A review and meta-analysis that included 43,000 men from North America, Europe, Australia, and New Zealand found that between 1973 and 2011, sperm counts have dropped by 52%. Men in South America, Asia, and Africa did not see any significant decline. Why is this happening? The authors commented that “sperm count and other semen parameters have been plausibly associated with multiple environmental…

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