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Birth weight affected by warm temperatures during pregnancy

Ben-Gurion University of the Negev (BGU) and Harvard University researchers have developed a technique that measures the correlation between air temperature and birth weight. They evaluated the relationship between birth outcomes (focusing on birth weight) and ambient air temperature during pregnancy in Massachusetts between 2000 and 2008.

“We found that exposure to high air temperature during pregnancy increases the risk of lower birth weight and can cause preterm birth,” according to Dr. Itai Kloog, a senior lecturer in BGU’s Department of Geography and Environmental Development. “An increase of 8.5 °C in the last trimester of average exposure was associated with a 17g decrease in birth weight of babies born full term after adjusting for other potential risk factors.”

The paper, “Using Satellite-Based Spatiotemporal Resolved Air Temperature Exposure to Study the Association between Ambient Air Temperature and Birth Outcomes in Massachusetts” was recently published in the Environmental Health Perspectives journal.

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