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Updated: Oct 4, 2025

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Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects
Published on: April 21, 2022
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Effects of firefighting on semen parameters: an exploratory study.
Michelle Engelsman1,2, Leisa-Maree L Toms3, Xianyu Wang2
1Fire and Rescue NSW, Greenacre, New South Wales, Australia.
Reproduction & Fertility
|February 7, 2022
Summary
Firefighter semen quality may be impacted by occupational exposures. This study found lower semen parameters in firefighters, particularly younger ones, with increased fire exposure linked to reduced sperm quality.
Area of Science:
- Occupational Health
- Reproductive Toxicology
- Environmental Medicine
Background:
- Firefighters face significant occupational exposures to heat and chemicals.
- These exposures may potentially impact male reproductive health and fertility.
- Previous research on firefighter fertility is limited.
Purpose of the Study:
- To explore the association between occupational exposures and semen quality in firefighters.
- To assess the fertility parameters of firefighters in an exploratory study.
Main Methods:
- An online survey collected data on demographics, reproductive history, and occupational exposures.
- Semen analysis was performed on samples from 20 firefighters.
- Data were analyzed considering various firefighter characteristics and exposure levels.
Main Results:
- Overall, firefighter semen parameters were below World Health Organisation reference values.
- Firefighters younger than 45 exhibited a higher incidence of abnormal semen parameters (42%) compared to older firefighters (9%).
- Increased fire exposure frequency correlated with reduced sperm count, volume, normal forms, and total sperm count.
Conclusions:
- Firefighter occupational exposures are associated with reduced semen quality.
- Younger firefighters and those with higher fire exposure frequency appear more susceptible.
- Further research is warranted to confirm these findings and explore protective measures.
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