At the present the first options to induce ovulation in polycystic ovary syndrome with anovulatory infertility are clomiphene citrate (CC) and metformin. Notwithstanding the effectiveness of CC and metformin alone or in a sequential or combined regimen, a percentage of patients ranging from 5% to 30% remain anovulatory. For these patients, the use of gonadotropins for controlled ovarian stimulation (COS) is indicated.