Sperm counts in Western countries have decreased by half in recent years, suggesting a continuing and significant decline in male reproductive health, a new evidence review reports.
Sperm concentration decreased an average 52 percent between 1973 and 2011, while total sperm countdeclined by 59 percent during that period, researchers concluded after combining data from 185 studies. The research involved nearly 43,000 men in all.
“We found that sperm counts and concentrations have declined significantly and are continuing to decline in men from Western countries,” said senior researcher Shanna Swan.
…[I]n Europe, North America, New Zealand and Australia, “the declines are strong, significant and continuing,” she said.
…”We are worried about these low sperm counts not only because people have trouble conceiving, but also because men with low sperm counts go on to have higher all-cause mortality,” Swan said. Studies have shown “they die younger and they have more disease, particularly cardiovascular disease and cancer,” she added.
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