Men's Sperm Counts are Down Worldwide: Study

A new study reports significant declines in sperm count among men from Western countries — and scientists aren't sure why.
The researchers found in the past few decades, total sperm count in men from North America, Europe, Australia and New Zealand declined by almost 60 percent, while sperm concentration dropped 52 percent.
Declines in sperm count have been reported since 1992, but previous studies were criticized for small sample numbers and conflicting results. This new study takes a broader approach, looking at more than 7,000 studies from 1973 to 2011.
Links
https://www.thrillist.com/health/nation/male-fertility-why-sperm-counts-have-gone-down-in-the-last-50-years
 http://www.cbc.ca/news/health/sperm-count-declining-north-america-europe-australia-1.4220661
http://www.cnn.com/2017/07/25/health/sperm-counts-declining-study/index.htmlhttp://time.com/4871540/infertility-men-sperm-count/
http://www.menshealth.com/health/sperm-count-decline
 http://www.coventrytelegraph.net/news/uk-world-news/how-sperm-counts-plummeting-western-13385947