Sperm count in western men has dropped over 50 percent since 1973, paper finds

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.