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Related Experiment Videos

[Optimizing ovarian stimulation for IVF using GnRH antagonists].

E M Kolibianakis1

  • 1Center for Reproductive Medicine, Dutch Speaking Brussels Free University, Belgique.

Journal De Gynecologie, Obstetrique Et Biologie De La Reproduction
|January 12, 2005
PubMed
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GnRH antagonist regimens show lower pregnancy rates than agonists, likely due to endometrial advancement, not oocyte quality. Elevated progesterone and prolonged follicular phase negatively impact IVF success.

Area of Science:

  • Reproductive Endocrinology
  • In Vitro Fertilization
  • Endocrinology

Context:

  • Gonadotropin-releasing hormone (GnRH) antagonist regimens are increasingly used in assisted reproductive technology (ART).
  • Previous assumptions suggested comparable or superior pregnancy rates with GnRH antagonists versus agonists.
  • Oocyte and embryo quality are critical determinants of IVF success.

Purpose:

  • To investigate the factors influencing pregnancy rates in GnRH antagonist cycles.
  • To evaluate the impact of endometrial development and hormonal profiles on IVF outcomes.
  • To compare pregnancy rates between GnRH antagonist and agonist regimens.

Summary:

  • Pregnancy rates are lower with GnRH antagonist regimens compared to GnRH agonist regimens.

Related Experiment Videos

  • No adverse effect of GnRH antagonists on oocyte or embryo quality was observed.
  • Abnormal endometrial development, elevated progesterone, and prolonged follicular phase are associated with decreased pregnancy probability.
  • LH levels on day 8 of stimulation and endometrial advancement correlate with reduced pregnancy likelihood.

    • Impact:

    • Findings challenge previous assumptions about GnRH antagonist efficacy in ART.
    • Highlights the critical role of endometrial receptivity in IVF success.
    • Suggests potential strategies for optimizing stimulation protocols to improve pregnancy rates.