Open fire exposure increases the risk of pregnancy loss in South Asia

Tao Xue (), Guannan Geng, Yiqun Han, Huiyu Wang, Jiajianghui Li, Hong-tian Li, Yubo Zhou and Tong Zhu
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Tao Xue: Peking University Health Science Centre
Guannan Geng: Tsinghua University
Yiqun Han: Imperial College London
Huiyu Wang: Peking University Health Science Centre
Jiajianghui Li: Peking University Health Science Centre
Hong-tian Li: Peking University Health Science Centre
Yubo Zhou: Peking University Health Science Centre
Tong Zhu: Peking University Beijing

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract Interactions between climate change and anthropogenic activities result in increasing numbers of open fires, which have been shown to harm maternal health. However, few studies have examined the association between open fire and pregnancy loss. We conduct a self-comparison case-control study including 24,876 mothers from South Asia, the region with the heaviest pregnancy-loss burden in the world. Exposure is assessed using a chemical transport model as the concentrations of fire-sourced PM2.5 (i.e., fire PM2.5). The adjusted odds ratio (OR) of pregnancy loss for a 1-μg/m3 increment in averaged concentration of fire PM2.5 during pregnancy is estimated as 1.051 (95% confidence intervals [CI]: 1.035, 1.067). Because fire PM2.5 is more strongly linked with pregnancy loss than non-fire PM2.5 (OR: 1.014; 95% CI: 1.011, 1.016), it contributes to a non-neglectable fraction (13%) of PM2.5-associated pregnancy loss. Here, we show maternal health is threaten by gestational exposure to fire smoke in South Asia.

Date: 2021
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DOI: 10.1038/s41467-021-23529-7

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