Related Experiment Videos
[GnRH agonists versus antagonists during in vitro fertilization]
1Service de gynécologie obstétrique - médecine de la reproduction, hôpital Antoine-Béclère, 157, rue de la Porte-de-Trivaux, 92141 Clamart, France.
Annales D'Urologie
|November 24, 2005
Summary
Gonadotropin-releasing hormone (GnRH) antagonists and agonists optimize egg collection in in vitro fertilization (IVF). While agonists yield more eggs, both treatments offer comparable mature egg rates and fertility, with antagonists being better tolerated.
Area of Science:
- Reproductive Endocrinology
- In Vitro Fertilization Protocols
Context:
- GnRH antagonists and agonists are crucial for controlling oocyte collection during IVF.
- Patient characteristics (ovulatory, clinical, biological, ultrasound) and prior treatments influence stimulation protocol selection.
- Hormonal parameters (FSH, estradiol, inhibin B, AMH) and day 3 ultrasonography aid in predicting ovarian response and collection success.
Purpose:
- To compare the efficacy and side effects of GnRH antagonists versus agonists in IVF stimulation protocols.
- To inform the selection of optimal stimulation strategies based on patient-specific factors and treatment outcomes.
Summary:
- Agonists suppress LH, preventing ovulation but carry a risk of flare-up and desensitization. Antagonists, given later, rapidly reduce LH without these side effects.
- Meta-analyses indicate agonists produce more oocytes, but mature oocyte rates and fertility are similar between both protocols.
- Agonist protocols are simpler for sequential IVF cycles, while antagonist protocols are beneficial for poor responders and generally better tolerated.
Impact:
- Provides insights into optimizing IVF stimulation for improved patient outcomes.
- Highlights the importance of personalized treatment selection based on predictive factors.
- Contributes to the understanding of GnRH analog mechanisms in assisted reproductive technologies.