IGFBP1 and polycystic ovary syndrome: Regarding endometrial receptivity indicators, levels of IGFBP-1 and HOXA10 were significantly lower in the PCOS group compared to the Control group, suggesting abnormal endometrial receptivity following decidualization (Fig. 3C and D, MD of IGFBP-1 and HOXA10 = 0.8386, 0.6601, p < 0.0001, p < 0.0001; Fig. 3E and F, MD of IGFBP-1 and HOXA10 = 849.2, 1240, p = 0.0002, p < 0.0001).