Fig. 3

H&E staining outcomes in PCOS and treatment groups (n = 15). This figure demonstrates the impact of BMSCs-Exo treatment on ovarian tissue morphology. H&E staining highlights the abnormal ovarian architecture in the PCOS group, contrasting with the improved ovarian environment observed after BMSCs-Exo treatment, suggesting a potential role in restoring ovulatory function. Scale bar = 50 μm