Fig. 1

Immunohistochemistry staining of TPP1 in fertile human endometrial tissues across the cycle. a Proliferative phase, b early secretory phase, c mid-secretory phase, d late secretory phase, e mid-secretory phase probed with isotype-matched negative control, f human placental tissue positive control probed with TPP1. Immunohistochemistry staining intensity scores (mean ± SEM) of TPP1 expression in (g) luminal epithelial cells, (h) glandular epithelial cells and (i) stromal cells. PF = proliferative fertile, ESF = early-secretory fertile, MSF = mid-secretory fertile, LSF = late-secretory fertile, Scale bar = 100 μm. Unpaired student t-test were used with statistical threshold of p < 0.05