【摘 要】
：
Low birth weight (LBW) is defined as a birth weight of less than 2,500 g. It has been estimated that 15％–20％ of infants (more than 20 million worldwide) were born with LBW, and 95.6％ of the overall LBW infants were born in low and middle income countries[
【机 构】
：
National Health Commission Key Laboratory of Birth Defects Prevention,Henan Key Laboratory of Popula
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Low birth weight (LBW) is defined as a birth weight of less than 2,500 g. It has been estimated that 15％–20％ of infants (more than 20 million worldwide) were born with LBW, and 95.6％ of the overall LBW infants were born in low and middle income countries[1]. Not only is LBW a crucial cause of infant mortality and morbidity, it also plays a critical role in adverse health outcomes later in life. Therefore, exploring the factors influencing LBW may have important implications for reducing maternal-child health burden.rnIn recent years, the global climate has been undergoing drastic changes. Pregnant women are susceptible to extreme temperature due to their hormone-related physiological changes and variations in immunity and mood[2]. Although the risk of LBW in relation to prenatal exposures to temperature has been studied previously, the findings are inconsistent due to heterogeneity in the socio-economic and environmental factors of different regions[3]. Therefore, it is necessary to explore the effects of meteorological conditions on LBW risk in specific regions.
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