There were no differences between the groups in terms of age, BMI, smoking status, duration and etiology of infertility, baseline FSH, LH, E2, TSH, prolactin levels, antral follicle count, duration of stimulation, stimulation protocol, total gonadotropin dose required, peak E2 levels, progesterone levels, and endometrial thickness on hCG administration and transfer days (p>0.05). The gene discussed is PLOD1; the disease is Infertility.