The effect of a GnRH antagonist to the secretion of LH in normal women
Abstract
Ganirelix is a GnRH antagonist, which is widely used in Assisted Reproduction Technology (ART), for the prevention of premature LH peaks. Kisspeptin is a neuropeptide, which is secreted from the hypothalamus, and may have a crucial role on the onset of puberty in humans and on ovulation in women. The aim of this study was to examine the effect of Ganirelix on the secretion of LH and on follicle maturation in healthy women. Patients and measurements: Ten healthy female volunteers were studied during two menstrual cycles, i.e. cycle 1 (control, spontaneous cycle) and cycle 2 (Ganirelix). In both cycles, blood samples were taken daily starting on cycle day 2 until ovulation occurred on cycle 1 and transvaginal ultrasound was performed on cycle day 8 and 10 and then on a daily basis until ovulation occurred. During cycle 2, all women were given S.C. injections of the GnRH antagonist Ganirelix at the dose of 0,25 mg/day, starting on cycle day 2 until the day of the endogenous LH surge in cy ...
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