Identification of maternal deposition and zygotic activation. (A) Venn diagrams of maternal deposit (left) and zygotic activation (right) conserved across mice and pigs or specific to mice or pigs. Maternal deposit genes are defined by RPKM > 3 in oocyte samples. (B) Histograms of regulated genes (sum of increased and decreased genes). The expression of regulated genes was found to be significantly different between two joint time points when corrected (P-value <0.05 and fold change > 2).