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. 2015 Feb 13;15:30. doi: 10.1186/s12884-015-0466-7

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© Luiza et al.; licensee BioMed Central. 2015

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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Correlation of maternal plasma cortisol and urine cortisol between depressed and non-depressed pregnant women. Trend line for all study subjects is the solid black line (r² = 0.25, p < 0.001). Trend line for the depressed subjects only (closed symbols) is the fine dashed line (r² = 0.22, p < 0.02), and the trend line for the non-depressed subjects only (open symbols) is the heavy dashed line (r² = 0.28, p < 0.01).