Waldbrandrauch wird mit einer Verschlechterung der Spermienqualität in Verbindung gebracht. Untersuchungen ergaben einen Rückgang der Spermienkonzentration, der Gesamtzahl der Spermien, der Gesamtzahl der beweglichen Spermien und der Gesamtzahl der zunehmend beweglichen Spermien. Es gab auch einen Anstieg des Prozentsatzes progressiv beweglicher Spermien.

As wildfires grow more frequent across the U.S. and Canada, their hidden toll may extend into the fertility clinic. A new study from UW Medicine suggests that wildfire smoke exposure may reduce key measures of sperm quality in patients undergoing fertility treatments. 

The research, published in Fertility and Sterility, encompassed an analysis of semen samples from 84 men who provided sperm for intrauterine insemination procedures between 2018 and 2022. Major wildfire smoke events in the Seattle area occurred in 2018, 2020 and 2022. By comparing semen analyses collected before and during wildfire seasons, the researchers were able to track changes in sperm health. 

“This study takes advantage of our institution’s location in the Puget Sound region, where wildfire smoke events create distinct pre- and post-exposure periods in a natural experiment to examine how a sudden, temporary decline in air quality influences semen parameters,” the authors wrote. 

The team found consistent declines in sperm concentration, total sperm count, total motile (movement-capable) sperm count, and total progressively motile sperm count during wildfire smoke exposure. One measure, the percentage of progressively motile sperm, showed a slight increase, though it was not enough to offset the overall reductions in sperm quality

https://www.sciencedirect.com/science/article/abs/pii/S0015028225018552?dgcid=author