Fig. 4From: The DNA demethylation-regulated SFRP2 dictates the progression of endometriosis via activation of the Wnt/β-catenin signaling pathwayImmunohistochemical staining of SFRP2 protein in different endometrium tissues. A Normal endometrium. B Eutopic endometrium (endometrium in the uterine cavity of the EMS patients). C ectopic endometrium. D Through the immunohistochemistry staining, it was found that SFRP2 was clearly located in the cytoplasm and was yellowy-brownBack to article page