Typical example of PR and ER isoform expression in patients with ovarian endometriosis. PR-A and PR-B were detected using PR-A (A, B, S, D) and PR-B (E, F, G, H) antibodies. ERα and ERβ were detected using ERα (I, J, K, L) and ERβ (M, N, O, P) antibodies. The eutopic endometrium (A, E, I, M) in the proliferative phase was obtained from females undergoing hysterectomy for uterine fibroids. The ectopic endometrium was obtained from endometrioma of the control females (B, F, J, N), dienogest-treated females (C, G, K, O) and LA-treated females (D, H, L, P). Scale bar: 25 m.