What is prediabetes and how is it monitored during pregnancy?

Updated: Apr 29, 2020
  • Author: Thomas R Moore, MD; Chief Editor: George T Griffing, MD  more...
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Answer

Answer

Prediabetes is a term used to distinguish people who are at increased risk of developing diabetes. People with prediabetes have impaired fasting glucose (IFG) or impaired glucose tolerance (IGT). Some people may have both impaired fasting glucose and impaired glucose tolerance.

Impaired fasting glucose is a condition in which the fasting blood sugar level is elevated (100-125 mg/dL) after an overnight fast but is not high enough to be classified as diabetes. Impaired glucose tolerance is a condition in which the blood sugar level is elevated (140-199 mg/dL after a 2-h OGTT) but is not high enough to be classified as diabetes.

Women with prediabetes identified before pregnancy should be considered at extremely high risk of developing gestational diabetes mellitus during pregnancy. As such, they should receive early (first-trimester) diabetic screening. Prediabetes, impaired fasting glucose, and impaired glucose tolerance are not meaningful terms in prenatal management, unless patients exceed the plasma glucose limits for diagnosing gestational diabetes mellitus.


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