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Comparison of COCs of 44 h IVM porcine oocytes derived from follicles of the three different sizes. COCs from follicles of less than 1 mm (A), 1 to 3 mm (B), and 3 to 6 mm (C). COCs, cumulus-oocyte complexes; IVM, in vitro maturation. Scale bar = 500 μm.
