PLOD1 and Infertility: There were no statistically significant differences between the two groups in age, BMI, years of infertility, cause of subfertility, AMH level, basal estradiol level, FSH (follicle-stimulating hormone) level, or LH (luteinizing hormone) level of the matched patients, and the differences between these two groups (P > 0.05), as shown in Supplementary Table 1.