Fig. 1From: BDNF and TrKB expression levels in patients with endometriosis and their associations with dysmenorrhoeaImmunohistochemical staining of BDNF. (immunohistochemical staining, × 400, scale 20 μm). The expression of BDNF in eutopic and ovarian ectopic endometria of the endometriosis group was positive, which was indicated by yellow, brown and tan particulates, mainly discovered in the cytoplasm of epithelial cells or glandular epithelial cells. A Ectopic and eutopic endometrial staining and H-score of BDNF in stage II. B Ectopic and eutopic endometrial staining and H-SCORE values of BDNF in stage III. C Ectopic and eutopic endometrial staining and H-SCORE values of BDNF in stage IV. D H-SCORE values of BDNF expression of both proliferative (left) and secretory (right) phases for ectopic and eutopic endometrium in the endometriosis group and normal endometrium in the control group. *, P < 0.05; ∗ ∗ , P < 0.01; ∗ ∗ ∗ , P < 0.001Back to article page