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  • Title: GnRHa to trigger final oocyte maturation: a time to reconsider.
    Author: Humaidan P, Papanikolaou EG, Tarlatzis BC.
    Journal: Hum Reprod; 2009 Oct; 24(10):2389-94. PubMed ID: 19608565.
    Abstract:
    Recently GnRH antagonist protocols for the prevention of a premature LH surge were introduced, allowing final oocyte maturation to be triggered with a single bolus of a GnRH agonist (GnRHa). GnRHa is as effective as hCG for the induction of ovulation, and apart from the LH surge a FSH surge is also induced. Until recently, prospective randomized studies reported a poor clinical outcome when GnRHa was used to trigger final oocyte maturation in IVF/ICSI antagonist protocols, presumably due to a luteal phase deficiency, despite standard luteal phase supplementation with progesterone and estradiol. As GnRHa triggering of final oocyte maturation could possess advantages over hCG triggering in terms of a reduced if not eliminated risk of ovarian hyperstimulation syndrome (OHSS) and the retrieval of more mature oocytes, the challenge has been to rescue the luteal phase. In the literature now several studies report a luteal phase rescue with a reproductive outcome comparable to that of hCG induced final oocyte maturation. Although more research is needed, GnRHa triggering is now a valid alternative with potential benefits.
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