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>As new data emerge, however, many scientists now believe sperm counts have indeed fallen—and continue to fall. As a story in GQ noted earlier this year, a widely cited study published in 2017 by researchers from the Hebrew University and Mount Sinai’s medical school found that among nearly 43,000 men from North America, Europe, New Zealand, and Australia, sperm counts per milliliter of semen had declined more than 50 percent from 1973 to 2011. And not only that, “but total sperm counts were down by almost 60 percent: We are producing less semen, and that semen has fewer sperm cells in it,” wrote the GQ contributor Daniel Noah Halpern.
>declined more than 50 percent from 1973 to 2011