Significant differences in age, duration of infertility, PCOS, bFSH, bLH, AFC, total Gn dose , Gn duration, serum E2, P, and LH levels on HCG day, the numbers of retrieved oocytes and MII oocytes were noted in Group B compared with Group A. Compared with Group A, Group B exhibited the following features: younger maternal age, shorter duration of infertility, more PCOS patients, lower bFSH, higher bLH, more AFC, longer Gn duration, less total Gn dose, higher E2 levels on HCG day, greater number of retrieved oocytes and MII oocytes (Tables 1 and 2). This evidence concerns the gene PLOD1 and Infertility.