Fig. 1From: Correlation of cumulus gene expression of GJA1, PRSS35, PTX3, and SERPINE2 with oocyte maturation, fertilization, and embryo developmentClassification of cumulus cell samples used in this study. In total, 308 cumulus–oocyte complex (COC) samples were collected from 40 patients who underwent the ICSI procedure. Fertilized oocytes were cultured to day 3, and the early embryo morphology was assessed as described in “Materials and Methods”. CC indicates the cumulus cellsBack to article page