Trop Med Health. 2016 Dec 14;45:1. doi: 10.1186/s41182-016-0041-6. eCollection 2017.
Temperature during pregnancy influences the fetal growth and birth size.
Tropical medicine and health
Harunor Rashid, Miki Kagami, Farzana Ferdous, Enbo Ma, Toru Terao, Taiichi Hayashi, Yukiko Wagatsuma
Affiliations
Affiliations
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan ; International Centre for Diarrhoeal Diseases Research, Bangladesh (icddr,b), Dhaka, Bangladesh.
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.
- Department of Clinical Trial and Clinical Epidemiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8575 Japan.
- Faculty of Education, Kagawa University, Takamatsu, Kagawa Japan.
- Center for Southeast Asian Studies, Kyoto University, Kyoto, Japan.
PMID: 28077924
PMCID: PMC5223368 DOI: 10.1186/s41182-016-0041-6
Abstract
BACKGROUND: Birth weight and length have seasonal fluctuations. However, it is uncertain which meteorological element has an effect on birth outcomes and which timing of pregnancy would explain such effect. Therefore, the purpose of this study was to examine temperature effects during pregnancy and which timing of pregnancy has effects on size at birth.
METHODS: A large, randomized, controlled trial of food and micronutrient supplementation for pregnant women was conducted in Matlab, Bangladesh (MINIMat Study), where women were enrolled from November 2001 to October 2003. The fetal growth data which included the size at birth and information of their mothers were obtained (
RESULTS: Infants born in colder months (November-January) were shorter than those born in hot and dry, and monsoon months (mean (SD) of birth length was 47.5 cm (2.2) vs. 47.8 cm (2.1) vs. 47.9 cm (2.1) respectively;
CONCLUSIONS: These findings suggest that temperature affects both birth weight and length. The more temperature increased at the last month of pregnancy, birth length became longer. For birth weight, the temperature at mid-pregnancy affected in a positive way.
Keywords: Birth length; Birth weight; Temperature
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