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BPB exposure compromised the meiotic maturation of mouse oocytes. (A) Images depicting oocyte maturation with BPB (0, 50, 100, 150, 200 μM) exposure for 14 h. Bar,100 μm; Bar, 100 μm (small graph). (B) Rate of oocytes that extruded the first PB in control and BPB-treated groups. Control, n = 117; BPB, n = 88. ∗Significantly different (P < 0.05); ∗∗∗Significantly different (P < 0.001) compared with the corresponding control.
