After controlled for confounding factors: Age, Infertility duration, AMH, Basal serum FSH, LH, E2, P, T, AFC, BMI, Gn used dosage, Gn used duration, the results showed that TSH was negatively correlated with oocyte maturation of each PCOS patient [β = -0.124, P = 0.013,95%CI (-0.027 ~ -0.003)]. Here, PLOD1 is linked to Infertility.