PLOD1 and polycystic ovary syndrome: The multivariate linear regression analysis. CI: Confidence interval, OR: Odds ratio, OHSS: Ovarian hyperstimulation syndrome, BMI: Body mass index, LH: Luteinizing hormone, TSH: Thyroid-stimulating hormone, AMH: Anti-Mullerian hormone, FSH: Follicle-stimulating hormone, PCOS: Polycystic ovarian syndrome, IVF: In vitro fertilization