SEATTLE, Wash - Researchers at the University of Washington have found another side effect of the wildfire smoke that often blankets the Pacific Northwest: a decline in sperm quality.

Researchers at UW Medicine found that wildfire smoke exposure may reduce key measures of sperm quality in patients undergoing fertility treatment.

The study analyzed samples from 84 men between 2018 and 2022.

Major wildfire smoke events happened in Seattle during that time frame.

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