Figure 4.

(A–F) Immunofluorescent sections of endometriotic lesions at proestrus/estrus (A, C, E) or at metestrus/diestrus stages (B, D, F), by fixation of uterine tissue samples to the peritoneal wall; Sections were stained with DAPI to identify cell nuclei (blue), an antibody against the apoptosis marker Caspase-3 (red) (A-B); and an antibody against the proliferation marker Ki67 (red) (C-D); an antibody against CD31 for the detection of the microvascular endothelium (red) (E-F). Magnification: ×200.