Human menopausal gonadotropin versus recombinant follicle-stimulating hormone in normogonadotropic women down-regulated with a gonadotropin-releasinghormone agonist who were undergoing in vitro fertilization and intracytoplasmic sperm injection: a prospective randomized study

Objective: To evaluate clinical and endocrinological effects of intranasal (IN) vs. subcutaneous (SC) GnRH-a for pituitary down-regulation combined wi th hMG vs. rFSH. Design: Prospective, randomized study. Setting: University hospital, IVF unit. Patient(s): Three hundred seventy-nine normogonadotropic women eligible for IVF or ICSI. Intervention(s): Randomization to intranasal (IN) or SC GnRH-a and to hMG o r rFSH. Main Outcome Measure(s): Oocytes retrieved, embryos developed, clinical pre gnancy, and delivery rates. Serum hormone concentrations on stimulation day s 1 (S1) and 8 (S8), and oocyte pick-up (OPU) day. Result(s): After randomization, four groups were formed: IN/hMG (n = 100), IN/FSH (n = 98), SC/hMG (n = 89), and SC/FSH (n = 92). Mean number of oocyt es retrieved and of transferable and transferred embryos were similar in th e four groups. Clinical pregnancy rate per started cycle was significantly higher in the IN/HMG group than in the SC/FSH group (P<.05) and was interme diate in the two remaining groups. Se-LH on S8 in the two SC groups was sig nificantly lower than in the two IN groups. Se-E2 on S8 in the SC/FSH group was significantly lower than in the other three groups. Conclusion(s): The clinical and endocrinological outcome in IVF and ICSI-tr eated normogonadotropic women is significantly influenced by mode of down-r egulation as well as gonadotropin formulation. (Fertil Steril(R) 2001;76:54 3-9. (C) 2001 by American Society for Reproductive Medicine).