Baseline characters including maternal age, body mass index (BMI), antral follicle count (AFC), infertility duration, infertility type, follicle stimulation hormone (FSH), luteinizing hormone (LH), estrogen (E2) at the start of pituitary downregulation, Gn dose, Gn time, number of oocytes retrieved and clinical pregnancy rate were compared between two groups. Here, PLOD1 is linked to Infertility.