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  • Title: GnRH agonist trigger with intensive luteal phase support vs. human chorionic gonadotropin trigger in high responders: an observational study reporting pregnancy outcomes and incidence of ovarian hyperstimulation syndrome.
    Author: Christopoulos G, Vlismas A, Carby A, Lavery S, Trew G.
    Journal: Hum Fertil (Camb); 2016 Sep; 19(3):199-206. PubMed ID: 27662416.
    Abstract:
    A retrospective, cohort study of high-risk patients undergoing IVF treatment was performed to assess if there is a difference in clinical pregnancy rate, live birth rate and the incidence of ovarian hyperstimulation syndrome, when a GnRH agonist (GnRHa) trigger with intensive luteal support is compared to human chorionic gonadotropin (hCG) with standard luteal support. The control group consisted of 382 high-risk patients having a GnRH antagonist protocol with 194 receiving an hCG trigger. All patients had ≥18 follicles ≥11mm or serum oestradiol >18,000pmol/l on the day of trigger. Patients had a single or double embryo transfer at cleavage or blastocyst stage. Logistic regression was used to adjust for differences between the groups. An intention-to-treat analysis of all cycles was performed. No statistically significant differences were observed in terms of positive pregnancy test, clinical pregnancy rate and live birth rate. Only one patient (0.3%) was hospitalized with severe OHSS in the GnRHa group, compared to 26 patients (13%) in the hCG group. In conclusion, GnRHa trigger is associated with similar pregnancy rates with hCG trigger and a significant reduction in hospitalization for severe OHSS after an intention to treat analysis was performed.
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