Fig. 2

Immunohistochemistry staining of TPP1. Mid-secretory (a) fertile and (b) primary infertile human endometrial tissues, (c) anti-mouse isotype negative control, (d) human placental tissue positive control. Immunohistochemistry staining intensity scores (mean ± SEM) of TPP1 expression in (e) luminal epithelial cells, (f) glandular epithelial cells and (g) stromal cells. MSF = mid-secretory fertile, MSINF = mid-secretory infertile. Scale bar = 100 μm. Unpaired student t-test were used with statistical threshold of p < 0.05. *p < 0.05