BRD2 and polycystic ovary syndrome: LH level decreased significantly in PCOS‐IR rats compared with control rats (53.54 ± 7.81 vs. 13.48 ± 2.27; p < 0.05), while FSH showed significant increase in PCOS‐IR rats compared with control rats (5.54 ± 0.83 vs. 1.49 ± 0.37; p < 0.05) indicating characteristic hormonal disturbances in PCOS‐IR rats model.