The sperm count of men in Western countries has been declining precipitously with no signs of “leveling off,” according to new research, bolstering a school of thought that male health in the modern world is at risk, possibly threatening fertility.
By examining thousands of studies and conducting a meta-analysis of 185 – the most comprehensive effort to date – an international team of researchers ultimately looked at semen samples from 42,935 men from 50 countries from 1973 to 2011.
They found that sperm concentration – the number of sperm per milliliter of semen – had declined each year, amounting to a 52.4 percent total decline, in men from North America, Europe, Australia and New Zealand.
Total sperm count among the same group also tumbled each year for a total decline of 59.3 percent over the nearly 40-year period.
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10, Volume 12