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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Cortical granule localization before in vitro maturation (IVM). Representative images of porcine oocytes after isolation of oocytes from small (a) and medium (b) follicles. Oocytes were stained by PNA-labeled FITC (green color—cortical granules). Scale bar represents 20 µm.