Dysregulated miRNAs, including miR-33b, miR-142, miR-125b, miR-203a, and miR-423, have been identified in GCs from PCOS patients and may be involved in regulating the TGFβ-signaling pathway, promoting cell proliferation, and repressing apoptosis [37,40,41]. Here, TGFB1 is linked to polycystic ovary syndrome.