Abstract
Abstract 700 women with PCOS undergoing IVF/ICSI using flexible GnRH antagonist protocol, were included in the study, and randomized to either OCP pretreatment (n = 350), or no pretreatment (n = 350). The latter group received OCP pretreatment in the form of 30µg ethinyl estradiol / 3mg drospirenone (Yasmin®, Bayer AG, Berlin, Germany) pills for an interval of 21 to 28 days; after which COH was started following a 5-day pill wash-out period. OCP-pretreated PCOS women had more retrieved oocytes, albeit, on the expense of increased gonadotropin consumption. However, this increased oocyte yield did not translate to a significant effect on conception rates among intended-to-treat PCOS woman receiving OCP pretreatment. Conversely, it shifted among OCP-pretreated women who actually started COH cycle, to a significant 18% reduction in the probability of successful pregnancy.
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