Sperm counts of Western men are plummeting, analysis finds - CNN.com

Sperm counts of men in North America, Europe, Australia and New Zealand are plunging, according to a new analysis published Tuesday. Among these men there has been a 52% decline in sperm concentration and a 59% decline in total sperm count over a nearly 40-year period ending in 2011, the analysis, published in the journal Human Reproduction Update, said....
http://www.cnn.com/2017/07/25/health/sperm-counts-declining-study/index.html