Figure 8: Effect of exogenous melatonin on circulatory level of luteinizing hormone (LH) in PCO rats; showing recovery with a significant decrease in LH level as 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.