PLOD1 and Infertility: Multivariate binary logistic regression analysis with the likelihood ratio and backward regression was conducted to assess potential influencing factors, including age, baseline FSH, AMH, AFC, BMI, primary infertility status, infertility factors, duration of Gn, Gn dosage, LH and E2 levels on hCG injection day, endometrial thickness, the number of available embryos, and the P/O ratio.