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. 2015 Jul 24;10(7):e0133887. doi: 10.1371/journal.pone.0133887

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© 2015 Ou et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 6 — The number of high-quality embryos in the long protocol group was significantly greater than that in the short protocol group for all age ranges (P<0.05). This value significantly decreased with increasing age (P<0.05). * P<0.05 versus the short protocol group.