Journal
HUMAN REPRODUCTION
Volume 20, Issue 9, Pages 2373-2375Publisher
OXFORD UNIV PRESS
DOI: 10.1093/humrep/dei086
Keywords
assisted reproductive technology; GnRH antagonist; IVF; ovarian stimulation; registry
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The place of GnRH antagonists in ovarian stimulation is controversial. Meta- analyses on studies comparing GnRH agonist and GnRH antagonist treatment regimens have suggested a comparatively lower efficacy of GnRH antagonists, which is likely to have influenced clinicians' attitudes. This report describes GnRH antagonist utilization for ovarian stimulation in Germany from 2000-2003. Data from the national IVF registry were analysed. The majority of ovarian stimulation cycles are still performed in long GnRH agonist protocols, although a significant increase in GnRH antagonist usage has been noted (P < 0.0001). Two observations support the notion that GnRH antagonists are often utilized as a treatment option in cycles with an unfavourable a priori prognosis: (i) the proportion of GnRH antagonist cycles increases with cycle rank (P < 0.0001, chi(2) for linear trend); and (ii) GnRH antagonist cycles are more often conducted in older patients as compared to GnRH agonist cycles (P < 0.0001). This has important implications for interpreting clinical performance of GnRH antagonists outside a research context.
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