Key Takeaways

Wildfire smoke might affect men’s fertility

Sperm quality fell during wildfires

Future research is needed to see how sperm bounce back

THURSDAY, Oct. 9, 2025 (HealthDay News) — Wildfire smoke could be damaging men’s fertility, according to a new study.

Key measures of sperm quality appeared to drop among dozens of men participating in fertility treatments, researchers recently reported in the journal Fertility and Sterility .

“These results reinforce growing evidence that environmental exposures — specifically wildfire smoke — can affect reproductive health,” said senior researcher Dr. Tristan Nicholson , an assistant professor of urology in the University of Washington School of Medicine in Seattle.

“As we see more frequent and intense wildfire events, understan

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