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Lipid tolerance testing in pregnancy

R M Cowett1, S R Carr, P L Ogburn

  • 1Department of Pediatrics, Women and Infants Hospital of Rhode Island, Providence 02905-2401.

Diabetes Care
|January 1, 1993
PubMed
Summary
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Gestational diabetes mellitus (GDM) may alter lipid metabolism during pregnancy. A lipid tolerance test (LTT) showed no significant differences in lipid metabolism between normal pregnant individuals and those with GDM.

Area of Science:

  • Endocrinology
  • Metabolic Disorders
  • Lipid Metabolism

Background:

  • Macrosomia in infants of diabetic mothers suggests factors beyond glucose influence fetal growth.
  • Gestational diabetes mellitus (GDM) is hypothesized to alter maternal lipid homeostasis.
  • Identifying lipid abnormalities in GDM is crucial for understanding fetal growth complications.

Purpose of the Study:

  • To evaluate the utility of a lipid tolerance test (LTT) in identifying lipid abnormalities in individuals with GDM.
  • To investigate potential alterations in lipid metabolism during pregnancy and their association with GDM.

Main Methods:

  • A lipid tolerance test (LTT) involving Intralipid infusion was administered.
  • Plasma glucose, insulin, glycerol, triglycerides, fatty acids, and phospholipids were measured before and after infusion.

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  • Study groups included nonpregnant, pregnant non-diabetic, insulin-treated GDM, and diet-controlled GDM individuals.

    • Main Results:

    • No significant changes in plasma glucose or insulin were observed post-infusion.
    • Glycerol kinetics did not differ significantly between nonpregnant and pregnant groups.
    • Nonpregnant individuals showed faster triglyceride clearance compared to all pregnant groups, but no differences were found among pregnant groups.

    Conclusions:

    • Pregnancy is associated with a reduced rate of triglyceride lipolysis compared to the nonpregnant state.
    • No significant differences in lipid metabolism were detected between normal pregnant individuals and well-controlled GDM patients.