Induction of ovulation with pulsatile GNRH: comparison between subcutaneous and intravenous administration in the same patients

: In this study we compared the results obtained during GnRH pulsatile therapy for ovulation induction in the same patients receiving successively GnRH by subcutaneous (10 mcg/90') and intravenous route (2.5 or 5 mcg/90'). Our data suggest that intravenous administration is the most effective procedure for restoring fertility, either in terms of hormonal levels (oestradiol and gonadotropin peaks) or ovulation rate (100% of ovulatory cycles on GnRH treatment versus 25% on subcutaneous administration). With regard to intravenous GnRH therapy, the dose of 2.5 mcg/90' may be more advisable and safe from ovarian overstimulation.