Study: If trends continue, all men may be infertile by end of century

Last summer, however, a research team in Israel (the country at the forefront of reproductive technology) assembled a massive dataset, combining hundreds of prior studies, creating a sample of tens of thousands of men across decades. They found that male sperm counts are indeed in decline.

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While their findings aren’t universally accepted, they have succeeded in persuading a large number of former skeptics. The sample sizes are sufficiently large, the extra checks for possible counterarguments sufficiently robust, and the findings sufficiently clear in the data that it’s time to take seriously that men really may be losing some degree of their biological fertility.

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