As OCT4 is frequently up-regulated in endometriotic tissues [15–17], therefore, the present study aimed to investigate the roles of TGF-βI/TGF-β receptor (TGF-β R in human endometriosis by evaluating the expression profiles of OCT4 and TGF-β RI in ectopic endometrial tissues. Here, POU5F1 is linked to endometriosis.