Box plot showing the effect of polycystic ovary syndrome (PCOS), chamomile flower extract, and metformin (Met) treatments on (A) serum creatinine concentration, (B) serum urea concentration, and (C) serum blood urea nitrogen (BUN) concentration. The data represent the distribution of 6 rats in each group. Significant differences between groups were analyzed using analysis of variance (ANOVA), followed by Tukey’s multiple comparison test. *Significant difference compared to the control group (p ≤ 0.05). #Significant difference compared to the untreated PCOS group (p ≤ 0.05).