Cetrorelix in women with poor ovarian response in previous assisted reproduction cycles

Our aim was to compare a gonadotrophin-releasing hormone (GnRH) antagonist protocol with an analogue protocol using high dose gonadotrophins (rFSH) in women with poor ovarian response in order to optimise the management while undergoing assisted reproduction treatment. We recruited 31 consecutive patients over 5 months. The eligibility criteria for the study were: one or more previous cancelled cycle due to or=4,500 IU of rFSH. For the antagonist cycle regimen, we used daily 300 IU of rFSH from day 2 on the menses, and then from day 5 daily 0.25 mg of Cetrorelix until the day of human chorionic gonadotrophin (hCG) administration. We demonstrated that the use of an antagonist cycle was associated with a reduction in cancellation rates from 48% (agonist) to 10% (antagonist) (p < 0.039) allowing women to undergoing oocyte retrieval and embryo transfer with a non-significant improvement in the pregnancy rates.