Optimizing GnRH antagonist administration: meta-analysis of fixed versus flexible protocol.

Area of Science:

• Reproductive Endocrinology
• Infertility Treatment
• Clinical Trial Analysis

Background:

• Optimizing controlled ovarian stimulation protocols is crucial in assisted reproductive technologies.
• Gonadotrophin-releasing hormone (GnRH) antagonists are widely used to prevent premature luteinizing hormone surges.
• Flexible versus fixed administration protocols for GnRH antagonists are debated for efficacy and cost-effectiveness.

Purpose of the Study:

• To compare the efficacy and resource utilization of flexible versus fixed GnRH antagonist administration protocols.
• To determine if flexible GnRH antagonist administration, based on follicular size, improves pregnancy rates.
• To evaluate medication requirements in flexible versus fixed GnRH antagonist protocols.

Main Methods:

• A meta-analysis of randomized controlled trials (RCTs) was performed.
• A comprehensive literature search identified relevant studies.
• Data from four eligible RCTs were analyzed using RevMan software.

Main Results:

• No statistically significant difference in pregnancy rates was observed between flexible and fixed GnRH antagonist protocols.
• A trend towards higher pregnancy rates was noted with fixed protocols, particularly when administration was delayed beyond day 8.
• Flexible protocols resulted in a significant reduction in the number of antagonist ampoules and the amount of gonadotrophin used.

Conclusions:

• Flexible and fixed GnRH antagonist administration protocols show comparable pregnancy rates in assisted reproduction.
• Flexible protocols offer a significant advantage in reducing medication costs, specifically recombinant follicle-stimulating hormone (FSH).
• Further research may explore optimal timing for fixed protocols to potentially enhance pregnancy outcomes.