Progestin-induced endometrial shedding (PIES) followed by clomiphene citrate is fertility treatment of choice in anovulatory women with polycystic ovary syndrome (PCOS). However, some preliminary data suggest that skipping PIES could result in a higher live birth rate. The investigators are performing the first randomized controlled trial to find out if skipping the use of progestin during fertility treatment of anovulatory PCOS women is associated with improved pregnancy and live birth rates compared to the traditional approach of using progestin prior to use of clomiphene citrate.