Figure 9: Effect of exogenous melatonin on circulatory level of follicle stimulating hormone (FSH) in PCO rats; showing recovery with a significant decrease in FSH level compared to control groups of rats; Histogram represents Mean+ SE; n=6; Con: Control, L: Letrozole, L+Mel=Letrozole+Melatonin, Mel: Melatonin. Con vs. L=p<0.05, Con vs. L+Mel=p<0.05, Con vs. Mel=NS, L vs. L +Mel=p<0.05. NS: Not Significant.