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. 2019 Oct 22;14(10):e0224087. doi: 10.1371/journal.pone.0224087

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© 2019 Mukunoki 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 credited.

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Fig 5 — A) Cross-sectional area of the zona pellucida was measured (31–34 oocytes/experiment). B) The extent of expansion of the zona pellucida was calculated as follows: (cross-sectional area of each group / cross-sectional area in 0 mM NAC) × 100. Results are expressed as mean ± SD (n = 4). *P < 0.05 compared with control (0 mM NAC).