Journal
NUTRIENTS
Volume 13, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/nu13030748
Keywords
glycemic load; obese women; pregnancy; glucose metabolism; dietary intervention
Categories
Funding
- National Institute of Child Health And Human Development [R01HD046741]
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The study showed that a low-glycemic load (GL) diet during the second half of pregnancy did not significantly improve glucose and metabolic parameters in obese women. However, compared to non-study women, dietary counseling reduced the risk of adverse outcomes.
The increased prevalence of obese, pregnant women who have a higher risk of glucose intolerance warrants the need for nutritional interventions to improve maternal glucose homeostasis. In this study, the effect of a low-glycemic load (GL) (n = 28) was compared to a high-GL (n = 34) dietary intervention during the second half of pregnancy in obese women (body mass index (BMI) > 30 or a body fat >35%). Anthropometric and metabolic parameters were assessed at baseline (20 week) and at 28 and 34 weeks gestation. For the primary outcome 3h-glucose-iAUC (3h-incremental area under the curve), mean between-group differences were non-significant at every study timepoint (p = 0.6, 0.3, and 0.8 at 20, 28, and 34 weeks, respectively) and also assessing the mean change over the study period (p = 0.6). Furthermore, there was no statistically significant difference between the two intervention groups for any of the other examined outcomes (p >= 0.07). In the pooled cohort, there was no significant effect of dietary GL on any metabolic or anthropometric outcome (p >= 0.2). A post hoc analysis comparing the study women to a cohort of overweight or obese pregnant women who received only routine care showed that the non-study women were more likely to gain excess weight (p = 0.046) and to deliver large-for-gestational-age (LGA) (p = 0.01) or macrosomic (p = 0.006) infants. Thus, a low-GL diet consumed during the last half of pregnancy did not improve pregnancy outcomes in obese women, but in comparison to non-study women, dietary counseling reduced the risk of adverse outcomes.
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