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. 2018 Jan 5;11:2. doi: 10.1186/s13048-017-0378-4

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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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Fig. 1 — Live birth rates with fresh versus cryopreserved donated oocytes, 2013–2015. * P < 0.001; Live birth rates were compared using the two-tailed Fisher’s exact test and Wilson confidence interval for binomial proportions. ^{^} 2015 data were calculated from a preliminary report distributed by SART