After PSM, there were no statistical differences in age, infertility type, BMI, as well as number of giving birth and number of pregnancies before IVF/ICSI between PCOS and non-PCOS clinical pregnancy cycles (all P > 0.05), but AMH, basal FSH, basal LH, basal testosterone and AFC were still statistically different between the two groups (all P < 0.05). The gene discussed is PLOD1; the disease is polycystic ovary syndrome.