CHRDL1 and polycystic ovary syndrome: The PCOS patients were divided into 2 groups according to the expression level of CHRDL1, and 29 up-regulated and 16 down-regulated genes were identified as significantly associated with CHRDL1 expression between the groups (FDR-adjusted P < 0.05 and |logFC| > 0.5, Figure 4A).