Fig. 3From: Melatonin improves the first cleavage of parthenogenetic embryos from vitrified–warmed mouse oocytes potentially by promoting cell cycle progressionAnnexin-V staining of 2-cell embryos. The Y-axis represents the average fluorescence intensity per unit area. The fluorescence intensity per unit area = the total fluorescence density of a single 2-cell embryo/ the total area of a single 2-cell embryo. The experiment was repeated three times. The data are expressed as mean value ± standard error. Values with different superscripts (a, b) are significantly different (P < 0.05). “n” represents the cell number used in this experimentBack to article page