Abstract
Introduction: Gonadotropin-releasing hormone (GnRH) agonist triggers are increasingly used in antagonist in vitro fertilization (IVF) cycles to prevent ovarian hyperstimulation syndrome (OHSS) following a robust ovarian response. The luteolytic effects of GnRH agonists inhibit implantation or spontaneous pregnancy, warranting freezing available blastocysts for future transfer after the risk of OHSS subsides. Case Report: A 33-year-old G1P1 with secondary infertility due to polycystic ovarian syndrome underwent IVF with a GnRH antagonist cycle. A leuprolide acetate trigger for final oocyte maturation was prescribed given her risk of OHSS. A spontaneous dichorionic/diamniotic twin pregnancy ensued. Conclusion: This case reinforces the importance of advising abstinence during the stimulation phase of an IVF cycle and that, although rare, the endometrium may allow for spontaneous conception following a leuprolide acetate trigger, which may further potentiate the risk of late OHSS.
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