In China, the classification of subtypes and treatment of PCOS are mainly based on clinical indices, such as sex hormones (e.g., follicle-stimulating hormone (FSH), luteinizing hormone (LH), LH/FSH ratio, free testosterone, dehydroepiandrosterone (DHEAS), androstenedione, sex-hormone-binding globulin), serum lipids (e.g., total cholesterol, triglycerides, low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), apolipoprotein (Apo) A, Apo B), and the results of oral glucose tolerance tests and immunoreactive trypsinogen tests [1]. The gene discussed is PLOD1; the disease is polycystic ovary syndrome.