We found no expression changes of PAX6, ESR2, IGFBP1, and IRS1 genes among the study groups, probably due to the limitations of the present study since these genes have been reported to be differentially expressed in the endometrium of women with PCOS compared to women without the disease [9,22,23,62,63]. Here, IGFBP1 is linked to polycystic ovary syndrome.