Over 1.1 million firefighters protect our communities and environment in the United States.1 Firefighters face hazardous conditions and chemicals while on the job, which may have safety and health implications. The National Fallen Firefighters Foundation named reproductive health as a priority research topic in 2021. But so far very few studies have evaluated birth defects among the children of firefighters. This may be in part because of the difficulty of studying these rare conditions. Researchers from the National Institute for Occupational Safety and Health and collaborators from the Centers for Disease Control and Prevention, University of North Carolina at
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