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Gu H, Wang L, Liu L, et\u00a0al. A gradient relationship between low birth weight and IQ: a meta-analysis. <i>Sci Rep<\/i>. 2017;7:18035.","DOI":"10.1038\/s41598-017-18234-9"},{"key":"2","doi-asserted-by":"crossref","unstructured":"2. Jornayvaz FR, Vollenweider P, Bochud M, Mooser V, Waeber G, Marques-Vidal P. Low birth weight leads to obesity, diabetes and increased leptin levels in adults: the CoLaus study. <i>Cardiovasc Diabetol<\/i>. 2016;15:73.","DOI":"10.1186\/s12933-016-0389-2"},{"key":"3","doi-asserted-by":"crossref","unstructured":"3. Blencowe H, Krasevec J, de Onis M, et\u00a0al. National, regional, and worldwide estimates of low birthweight in 2015, with trends from 2000: a systematic analysis. <i>Lancet Glob Health<\/i>. 2019;7:e849\u2013e860.","DOI":"10.1016\/S2214-109X(18)30565-5"},{"key":"4","unstructured":"4. OECD iLibrary. Health at a Glance: Asia\/Pacific 2020: Measuring Progress Towards Universal Health Coverage. 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Implications of assisted reproductive technologies on term singleton birth weight: an analysis of 25,777 children in the national assisted reproduction registry of Japan. <i>Fertil Steril<\/i>. 2013;99:450\u2013455.","DOI":"10.1016\/j.fertnstert.2012.09.027"},{"key":"27","doi-asserted-by":"crossref","unstructured":"27. Dewey KG, Oaks BM. U-shaped curve for risk associated with maternal hemoglobin, iron status, or iron supplementation. <i>Am J Clin Nutr<\/i>. 2017;106(Suppl 6):1694S\u20131702S.","DOI":"10.3945\/ajcn.117.156075"},{"key":"28","doi-asserted-by":"crossref","unstructured":"28. Kasuga Y, Shigemi D, Tamagawa M, et\u00a0al. Size for gestational age at birth according to offspring sex and gestational weight gain in underweight women. <i>J Dev Orig Health Dis<\/i>. 2019;10:536\u2013541.","DOI":"10.1017\/S2040174418001150"},{"key":"29","doi-asserted-by":"crossref","unstructured":"29. Darlow BA, Martin J, Horwood LJ. 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