Infertility — Effect of GnRH Agonist vs GnRH Antagonist on Oocyte Morphology During IVF/ICSI
Citation(s)
Aguilar-Rojas A, Huerta-Reyes M Human gonadotropin-releasing hormone receptor-activated cellular functions and signaling pathways in extra-pituitary tissues and cancer cells (Review). Oncol Rep. 2009 Nov;22(5):981-90. doi: 10.3892/or_00000525.
Cheung LW, Wong AS Gonadotropin-releasing hormone: GnRH receptor signaling in extrapituitary tissues. FEBS J. 2008 Nov;275(22):5479-95. doi: 10.1111/j.1742-4658.2008.06677.x.
Setti AS, Figueira RC, Braga DP, Colturato SS, Iaconelli A Jr, Borges E Jr Relationship between oocyte abnormal morphology and intracytoplasmic sperm injection outcomes: a meta-analysis. Eur J Obstet Gynecol Reprod Biol. 2011 Dec;159(2):364-70. doi: 10.1016/j.ejogrb.2011.07.031. Epub 2011 Aug 6.
Zanetti BF, Braga DPAF, Setti AS, Iaconelli A Jr, Borges E Jr Effect of GnRH analogues for pituitary suppression on oocyte morphology in repeated ovarian stimulation cycles. JBRA Assist Reprod. 2020 Jan 30;24(1):24-29. doi: 10.5935/1518-0557.20190050.
Effect of GnRH Agonist (Long Protocol) vs GnRH Antagonist (Flexible Protocol) on Oocyte Morphology During IVF/ICSI
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
