Assessment of the Sensitivity of the Hypothalamic GnRH Pulse Generator to Estradiol and Progesterone Inhibition

Inclusion Criteria: * Girls ages 8 to 18 * Hyperandrogenemic (testosterone level \> 0.4 ng/mL and/or hirsutism) * Normal screening labs (with exception of the expected hormonal abnormalities inherent in hyperandrogenemia) Exclusion Criteria: * Abnormal screening labs (with exception of the expected hormonal abnormalities inherent in hyperandrogenemia) * Congenital adrenal hyperplasia. * Hemoglobin \<12 mg/dL or hematocrit \< 36% (Subjects will be offered the opportunity to take iron supplementation for 60 days if their hematocrit is slightly low (33-36%) (suggestive of iron deficiency anemia) and will then return for retesting of their hemoglobin/hematocrit.) * Weight \< 31 kg * History of peanut allergy, deep venous thrombosis, breast cancer, endometrial cancer, or cervical cancer * On hormonal medications (including oral contraceptive pills) or on medications known to affect the reproductive axis within 3 months of the study * Pregnant or breastfeeding * Participation in a research study within the past 30 days that involved taking a study drug. * Participation in a research study that involved taking up to or greater than 473 ml's of blood within the past 60 days. * Cigarette smoking * History of surgery that required bedrest within the past 30 days * Family history of hypercoagulability or unexplained thromboembolic disease (not in setting of bedrest, surgery, or malignancy)