Impacts of extreme air pollution events on pregnancy outcomes: A systematic review.
Environ ResJul 10, 2026 (epub)
Clinical ResearchObstetrics & Gynecology
Junpeng Liu, Chris Kypridemos, Brendan Collins et al.
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In 30 seconds
This systematic review assessed the impact of extreme air pollution events on pregnancy outcomes, analyzing 30 studies. It found that exposure to such events, particularly wildfire-related PM 2.5, was associated with increased risks of preterm birth (odds ratios of approximately 1.4-1.6) and low birth weight (odds ratios of approximately 1.03-1.06).
Key findings
- Exposure to extreme air pollution events was linked to a 1.4-1.6 odds ratio for preterm birth.
- Low birth weight was associated with odds ratios ranging from 1.03 to 1.06.
- PM 2.5 was the most studied pollutant, with 26 studies focusing on its effects.
- Preterm birth was reported as an adverse outcome in 18 studies.
Why it matters
Understanding the risks associated with extreme air pollution events is crucial for clinicians, as these environmental factors can significantly impact maternal and fetal health, influencing clinical management and public health policies.