Evaluation and Comparison of Noninvasive Blood Glucose Concentrations

Inclusion Criteria: * Female aged ≥ 18 and ≤ 50 years of age at time of enrollment * Females with self reported diagnosis of Type I, Type II or Gestational Diabetes, or no self reported diagnosis of diabetes. Exclusion Criteria: * Severe heart disease as evidenced by peripheral edema (self reported) * Currently taking Lasix (self reported) * Liver disease as evidenced by jaundice (self reported) * Receiving dialysis or having known renal compromise (self reported) * Skin damage at optical sampling site * Scars, tattoos, rashes or other disruption/discoloration on the right index finger * Recent (within past month) or current oral steroid therapy or topical steroids applied to the hands; inhaled steroid therapy (self reported) * Current chemotherapy, or chemotherapy within the past 12 months (self reported)