In obese PCOS patients, the expression of miR-124-3p was inversely linked with the Ferriman–Gallwey score, FINS, and serum T (P < 0.05), while being positively correlated with PRL (P < 0.05), but not with other indexes; in nonobese PCOS patients, miR-124-3p was negatively related to the Ferriman–Gallwey score and serum T (P < 0.05) and positively correlated with PRL (P < 0.05), but not with other parameters (Table 3). The gene discussed is PRL; the disease is polycystic ovary syndrome.