Introduction: Hypogonadotropic amenorrhea is one kind of primary amenorrhea which is caused by a decrease in GnRH secretion and results in infertility. As infertility is an important problem in 10-15% of couples, the present study was undertaken to determine the prevalence of the disease in infertile women and pregnancy rates in response to its treatment. Materials and Methods: This cross-sectional, analytical study included 35 subjects suffering from hypothalamic amenorrhea, pulled from 2150 patients who referred to the infertility center of Montaserieh Hospital in Mashad during 2000-2002. The gathered data included: the patients age, infertility duration, menstrual cycles, history of prior surgeries or illnesses, food regimens and drug history. A gynecologic exam, hormonal assays and sonographic evaluations were carried out. The patients underwent 3 cycles of ovulation induction procedures. A serum -hCG measurement and a vaginal sonography were used to confirm pregnancy. The data were analyzed by SPSS 11. For the descriptive analysis, t-test and logistic regression were used and the significance level was considered 5% (p < 0.05). Results: The patients aged 20-35 and their infertility period varied from 1.5 to 14 years. Three of them were excluded from the study because of loss to follow up. The prevalence rate was 1-6%. In all of the patients, the serum FSH and LH levels were