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. 2015 Mar 29;15:76. doi: 10.1186/s12884-015-0507-2

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© Mekonen et al.; licensee BioMed Central. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Characteristics of newborns. Distribution of birth weights in the cohort (panel A), the percentage of boys among offspring as a function of parity (panel B; R² = 0.85 with 3^rd order polynomial), and the percentage offspring with a birth weight <1,500 gram (blue symbols), between 1,500 and 2,500 gram (red symbols), or >2,500 gram (green symbols) (panel C for male and panel D for female infants).