Fig. 1From: No effect of exogenous melatonin on development of cryopreserved metaphase II oocytes in mouseEffects of melatonin on intracellular levels of reactive oxygen species (ROS) and glutathione (GSH) in vitrified-warmed mouse oocytes. Fluorescence intensities were correlated with intracellular levels of ROS and GSH. Number of Oocytes in each group (n). a and b denote significant differences (P < 0.05)Back to article page