Figure 1: Effect of exogenous melatonin on ovarian weight of letrozole induced (PCOS) showing significant increase in ovarian tissue weight, melatonin treatment showing a reversal to control group. 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=NS. NS: Non Significant.