The comparison of the basic data (age, BMI, AMH, FSH, LH, E2, years of infertility, number of embryos transferred, basal endometrial thicknesses, and transformational endometrial thicknesses) of the First Cycle and Second Cycle showed no statistically significant differences (P > 0.05), as shown in Table 1. Here, PLOD1 is linked to Infertility.