Sperm quality has been declining for 16 years among men in the US

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By Alice Klein

Vials of donor sperm frozen by liquid nitrogen

Vials of donor sperm frozen by liquid nitrogen

Ted Soqui/Corbis via Getty Images

A 16-year survey of US sperm donors shows that sperm prime has been steadily declining, perchance owed to accrued chemic vulnerability and manner changes.

Chelsea Canon astatine Reproductive Medicine Associates of New York, a fertility clinic, and her colleagues looked astatine much than 170,000 semen analyses conducted betwixt 2005 and 2021 for steadfast 19 to 38-year-olds from 9 geographic regions crossed the US. The researchers accidental the information comes from a “diverse set” of men, though it is unclear however typical it …

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