© 2005 by the American Diabetes Association, Inc.
Early Pregnancy Insulin Resistance and Subsequent Gestational Diabetes Mellitus
1 Renal Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts Address correspondence and reprint requests to Karen V. Smirnakis, MD, PhD, MPH, GRB 1003, Renal Unit, Massachusetts General Hospital, 55 Fruit St., Boston, MA 02114. Email: ksmirnakis@partners.org
Abbreviations: GDM, gestational diabetes mellitus GLT, glucose loading test HOMA, homeostasis model assessment
Gestational diabetes mellitus (GDM), which complicates 37% of all pregnancies, is associated with increased maternal and fetal morbidity (1). Identification of early risk markers may result in improved understanding of disease pathogenesis and identification of potential targets for intervention. We sought to determine the association between early pregnancy insulin resistance and subsequent abnormal glucose tolerance in pregnancy.
We conducted two institutional review boardapproved, prospective, nested, case-control studies within Massachusetts General Hospitals Obstetrical Maternal Study (MOMS) comparing subjects with GDM and subjects with abnormal glucose loading test (GLT) results but no GDM with control subjects. Consecutive MOMS participants with singleton gestations between February 2002 and February 2004 who provided fasting blood samples between 1618 weeks gestation, underwent GLT testing at 2428 weeks gestation, and delivered after 34 weeks were eligible. To limit confounding
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