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. 2021 May 1;17:181. doi: 10.1186/s12917-021-02882-1

Fig. 1.

Fig. 1

The mean ± SD concentrations of superoxide dismutase (SOD), glutathione peroxidase (GPX), catalase (CAT), and malondialdehyde (MDA) were compared between days of sampling in each group. Melatonin (0.3 mg/kg p.o.) was administrated on days -1, 0, 1, 2 and 3. Ovariohysterectomy and anesthesia were performed on day 0. Different letters on bars indicate significant differences between days of sampling in each group