Kisspeptin Administration Subcutaneously to Patients With Hypothalamic Amenorrhea

Inclusion Criteria: * Female * Ages 18-45 years * Acquired HH (hypothalamic amenorrhea, aka functional hypogonadotropic hypogonadism) * Normal blood pressure (systolic BP \< 140 mm Hg, diastolic \< 90 mm Hg) * Hemoglobin no less than 0.5 g/dL below the lower limit of the reference range for normal women * Negative serum hCG pregnancy test * No current or recent use of a medication (including hormonal replacement) that, in the opinion of a study investigator, can modulate the reproductive axis OR willing to complete an appropriate washout for that particular medication and its method of administration * If applicable, willing to use birth control methods (as approved by a study medical professional) during the entire study and for one month after the last dose of study drug Exclusion Criteria: * Any condition (medical, mental, or behavioral) that, in the opinion of a study investigator, would likely interfere with participation in/completion of the protocol * Excessive alcohol consumption (\>10 drinks/week) * Active use of illicit drugs * Pregnant * Trying to become pregnant during protocol participation * Breast feeding * History of any of the following: bilateral oophorectomy (ovaries were removed), breast cancer, thromboembolic disease, coronary artery disease, stroke, thrombophilic disorders, or undiagnosed abnormal genital bleeding