Abstract
Does corifollitropin alfa associated with hp-HMG protocol from the beginning of ovarian stimulation perform better than high dose rFSH alone for ovarian stimulation with GnRH antagonist in poor responders? This retrospective, monocentric, case-control pilot study was conducted in 65 poor responders (Bologna criteria) undergoing 2 consecutive IVF cycles. All patients underwent a first ovarian stimulation cycle with high dose rFSH (≥300 IU/day) alone in antagonist protocol, unfortunately leading to poor ovarian response and no pregnancy. The following cycle was performed with 150 μg of corifollitropin alfa associated with daily injections of hp-HMG from the beginning of the cycle. The primary outcome was the number of mature oocytes retrieved. The secondary outcomes were ovarian stimulation cancellation and embryo transfer rate per initiated cycle. The number of mature oocytes was not significantly different between the 2 groups. However, cycle cancellation rate was significantly lower and the proportion of cycles with embryo transfer was significantly higher with corifollitropin + hp-HMG protocol, leading to an encouraging clinical pregnancy rate of 24.1% per oocyte retrieval. This pilot study based on corifollitropin alfa associated with hp-HMG from the onset of stimulation appears to be promising for ovarian stimulation in poor responders.
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