PRL and Infertility: The two groups showed no statistically significant differences in body mass index (BMI), duration of infertility, number of previous cycles received, basal serum levels of luteinizing hormone (LH), estradiol (E2), prolactin (Prl), progesterone (P), testosterone (T), total gonadotropin dose, duration of stimulation and endometrial thickness on the day of human chorionic gonadotropin (hCG) administration.