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Related Concept Videos

Ovarian Cycle01:27

Ovarian Cycle

The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle length...
Hormonal Control of the Ovarian Cycle01:30

Hormonal Control of the Ovarian Cycle

The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle.  At puberty, GnRH secretion increases in both frequency and...

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Related Experiment Video

Updated: Jul 11, 2026

Fertility Preservation Through Oocyte Vitrification: Clinical and Laboratory Perspectives
08:46

Fertility Preservation Through Oocyte Vitrification: Clinical and Laboratory Perspectives

Published on: September 16, 2021

[Alternative approaches to ovarian stimulation].

S Alvarez1

  • 1Centre d'Assistance médicale à la procréation Eylau-Muette, clinique de la Muette, 4-8, rue Nicolo, 75116 Paris, France. silvia.alvarez@free.fr

Gynecologie, Obstetrique & Fertilite
|September 11, 2007
PubMed
Summary
This summary is machine-generated.

GnRH agonist treatment for ovarian stimulation can cause hyperstimulation. Alternative protocols using antagonists are being explored for improved outcomes and reduced complications in ovulation induction.

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Last Updated: Jul 11, 2026

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Area of Science:

  • Reproductive endocrinology and infertility treatments.
  • Pharmacological interventions in assisted reproductive technologies.

Context:

  • Gonadotropin-releasing hormone (GnRH) agonists are used for ovarian stimulation but carry risks of hyperstimulation.
  • Existing GnRH antagonist protocols require further validation regarding efficacy and complication rates.
  • Previous studies indicate potential for reduced egg retrieval and transfer success without adequate stimulation.

Purpose:

  • To evaluate the efficiency of alternative ovarian stimulation protocols, specifically those involving GnRH antagonists.
  • To explore new therapeutic molecules and personalized approaches for ovulation induction.
  • To optimize assisted reproductive technology outcomes while minimizing patient complications.

Summary:

  • Ovarian stimulation using GnRH agonists can lead to hyperstimulation syndrome.
  • GnRH antagonist protocols are being investigated as a safer alternative, but require more evidence.
  • Newer pharmacological agents and tailored treatments show promise for enhancing ovulation induction and reducing adverse events.

Impact:

  • Provides insights into optimizing ovarian stimulation protocols for assisted reproduction.
  • Highlights the need for further research into GnRH antagonist efficacy and safety.
  • Suggests a future direction towards personalized ovulation induction strategies for improved success rates and patient safety.