Baselines in Reproductive Disorders

The purpose of the study is to explore the way in which gonadotropins (pituitary hormones) are released into the body. The knowledge acquired in this study will be used for the diagnosis and treatment of reproductive endocrine disorders. We seek to investigate the baseline characteristics of the GnRH-induced gonadotropin pulsations of patients with the following diagnoses: * Hypothalamic Amenorrhea (HA) * Idiopathic hypogonadotropic hypogonadism (IHH) * Polycystic ovarian disease (PCOD) * Acquired hypogonadotropic hypogonadism (AHH) * Premature Ovarian Failure (POF) \*\*WE ARE CURRENTLY RECRUITING ONLY SUBJECTS WITH A DIAGNOSIS OF IHH.\*\* This has been an extremely productive and pivotal protocol in the studies of female reproductive physiology and pathophysiology and continues to be critical for defining the neuroendocrine abnormalities in patients with reproductive disorders. In some cases, it is also helpful in the planning of subsequent therapy if so desired. It is important to note that minors have been included in this protocol, as many patients are extremely anxious to know more about their neuroendocrine disorder. With minors who would like to know if their disorder is correctable, this protocol may be followed up with administration of pulsatile gonadotropin-releasing hormone (GnRH).