PARIS: Sperm count among men in North America, Europe, Australia and New Zealand has halved in 40 years, according to research warning of fertility risk, though outside experts urged caution about the results.
A review of data collected from nearly 43,000 men in 185 previous studies from 1973 to 2011, found a "significant decline" in sperm concentration, according to findings published in the journal Human Reproduction Update.
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