Suppression and flare regimens of gonadotropin-releasing hormone agonist. Use in women with different basal gonadotropin values in an in vitro fertilization program
Toth, T.L.; Awwad, J.T.; Veeck, L.L.; Jones, H.W.; Muasher, S.J.
Journal of Reproductive Medicine 41(5): 321-326
1996
ISSN/ISBN: 0024-7758 PMID: 8725756 Document Number: 464872
OBJECTIVE: to evaluate the suppression and flare regimens of gonadotropin-releasing hormone agonist (GnRH-a) in ovarian hyperstimulation in women with variable basal gonadotropin values in an in vitro fertilization (IVF) program. STUDY DESIGN: A retrospective study comparing the initiation of GnRH-a in the midluteal phase of the preceding cycle (suppression protocol) and follicular phase of the stimulated cycle (flare protocol) in women with basal follicle-stimulating hormone (FSH) values lt 15 mIU/mL and gtoreq 15 mIU/mL. RESULTS: The pregnancy rate per initiated cycle and implantation rate for women with basal FSH levels gtoreq 15 mIU/mL were 20.4% and 9.8% in flare GnRH-a cycles and 11.7% and 3.5%, respectively, in suppression GnRH-a cycles. Comparing the percent differences in clinical pregnancy and implantation rates between both protocols for women with different basal FSH values, pregnancy outcome was significantly greater in the flare protocol in women with values gtoreq 15 mIU/mL (P lt .001). Individualization of the stimulation protocol by retrospective sorting of women undergoing IVF with respect to their basal gonadotropin levels significantly improved clinical pregnancy (P lt .05) and implantation rates (P lt .05). CONCLUSION: The flare regimen with GnRH-a is a useful alternative for controlled ovarian hyperstimulationtion in women with elevated basal FSH values ( gtoreq 15 mIU/mL) undergoing IVF.