Univariate logistic regression analysis revealed that the serum 25(OH)D (B = 0.05, P = 0.001) and LH (B = 0.09, P = 0.050) levels were strongly correlated with pregnancy in PCOS patients who had undergone IVF/ICSI (Table 2). The gene discussed is PLOD1; the disease is polycystic ovary syndrome.