CCL4 and polycystic ovary syndrome: Finally, we observed a negative correlation among the level of FF MIP-1β in normal-BMI PCOS patients with D3 high-quality embryos (r = −0.65, P = 0.006 (Fig. 4B); FDR = 0.042 (Supplementary Table 6)) and the high-quality blastocyst rate (%) (r = −0.72 P = 0.003 (Fig. 4D); FDR = 0.042 (Supplementary Table 6).