Abstract
Background: To compare a flexible, multi-dose GnRH antagonist protocol with a long GnRH agonist protocol in poor responders. Materials and Methods: A randomized clinical trial of 70 poor responder patients (35 patients in GnRH antagonist protocol and 35 patients in long GnRH agonist protocol) was performed at Royan Institute, Tehran, Iran. Both groups were given a fixed dose of human menopausal gonadotropin (HMG) for stimulation and oral contraceptive pre-treatment. Data analyzed by student's group t-test or Chi square test. Results: Stimulation duration, total gonadotrophins consumption, mean numbers of oocytes retrieved, formed embryos, cycle cancellation rate, and clinical pregnancy rate were similar between both groups. Although the miscarriage rate was higher in the agonist protocol group, the rate of miscarriage was not statistically significant between both groups. Conclusion: A flexible, multi-dose GnRH antagonist protocol appears as effective as the long GnRH agonist protocol in poor responders. More (larger) randomized controlled trials for better statistical analysis are recommended.
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