In order to investigate whether ovarian hyperstimulation played a role in influencing the growth of the fibroids within the group of pregnant women, we performed a correlation between the percentage of volume growth of all lesions and serum AMH, day 3 serum FSH, total dose of gonadotropins administered, duration of stimulation, serum estrogen at the time of hCG administration and the number of oocytes retrieved. The gene discussed is BRD2; the disease is leiomyoma.