Fluorescence expression patterns of ST3GAL2 in porcine embryos during IVC. (A) ST3GAL2 expression was examined in embryonic development during IVC by immunofluorescence. (B) Quantitative analysis of ST3GAL2 protein levels in embryonic development during IVC. Data in the bar graph represent the means ± SEM of three independent experiments. Scale bar = 100 µm. Differences were considered significant at **p < 0.01 and ***< 0.001.