Pregnant women are advised to be screened for diabetic conditions during their initial prenatal visit. Screening tests could either be random blood sugar test, fasting blood sugar test, and glycosylated hemoglobin evaluation. A fasting blood sugar result of 92-125mg/dL implies the pregnant patient has gestational diabetes; while a result of 126 mg/dL and above indicates the pregnant patient is suffering from overt diabetes. Overt diabetes is a pre-existing condition that typically is associated with clinical symptoms including polyuria, polydipsia, and polyphagia. Gestational diabetes refers to the increased in serum glucose level during pregnancy and does not typically develop until late in the second trimester. Subclinical diabetes is the condition of insulin resistance that does not result in a clinically significant hyperglycemia. Autoimmune thyroid disease is a chronic disease in which the body destroys its own thyroid glands and is unrelated to hyperglycemia.