Today, despite having accurate and modern tools for ovulation induction, in daily practice, doctors continue to "fight" against two old problems of assisted reproduction: multiple pregnancies and ovarian hyperstimulation syndrome (OHSS). Application of assisted reproduction techniques (ARTs) and the use of medication that induce ovulation, risk producing gestations and multiple births with a higher frequency than those observed in spontaneous gestations. One of the facts that result in the appearance of such problems is the high incidence of polycystic ovarian syndrome among the population of women who are infertile due to anovulation. These subjects are especially sensitive to ovarian stimulation, which leads to multiple follicular development, a higher risk of hyperstimulation and higher rates of multiple pregnancies.