Pregnant Women with Controlled GDM Show No Added Obesity Risk in Offspring: Study
USA: Researchers have found in a new study that among women with gestational diabetes who maintain stable and optimal blood glucose levels during pregnancy, the risk of having children with obesity is comparable to that of women without gestational diabetes. In contrast, when glycemic control is suboptimal, the likelihood of obesity in offspring increases significantly.
These findings highlight that effective glucose management during pregnancy plays a crucial role in mitigating the long-term metabolic risk in children.
The study, published in Diabetes Care by Rana F. Chehab and colleagues from Kaiser Permanente Northern California, examined how different patterns of blood glucose control during pregnancy influence childhood growth and obesity risk. Gestational diabetes mellitus (GDM) has long been associated with adverse metabolic outcomes in offspring. Still, this large population-based analysis provides deeper insight into how the quality and consistency of glycemic control may alter that risk.
For this purpose, the researchers analyzed data from over 206,000 pregnant individuals who delivered between 2011 and 2017, along with follow-up data on their children up to 10 years of age. Among these, 14,870 individuals were diagnosed with GDM. The investigators categorized maternal glucose control into four distinct trajectories based on how consistently blood sugar targets, defined by the American Diabetes Association, were achieved from diagnosis until delivery.
These trajectories included consistently optimal control, rapid improvement to optimal levels, gradual improvement to near-optimal levels, and persistently suboptimal control.
The researchers reported the following findings;
- There was a clear gradient in outcomes based on maternal glycemic control during pregnancy.
- Children of mothers with consistently optimal glucose control had BMI and obesity risk comparable to those born to mothers without gestational diabetes.
- As glycemic control worsened across trajectory groups, the risk of higher BMI and obesity in offspring increased progressively.
- Offspring of mothers with improving but non-optimal or persistently suboptimal glucose levels had significantly higher BMI and greater obesity risk by age 10.
- A dose-response relationship was observed, indicating that partial improvement in glycemic control may not be sufficient to eliminate risk.
- The associations persisted even after adjusting for maternal prepregnancy BMI, although the strength of the relationship was reduced.
- These findings suggest that glycemic control during pregnancy independently influences long-term metabolic outcomes in children.
The findings highlight the importance of early identification and sustained management of gestational diabetes. Achieving and maintaining optimal glucose levels throughout pregnancy may offer a critical window for preventing childhood obesity and its associated health risks.
The authors emphasized that these results open avenues for better prenatal risk stratification and targeted interventions. By identifying women with suboptimal glycemic trajectories early, healthcare providers may implement more intensive management strategies to improve maternal and child health outcomes.
Reference:
Rana F. Chehab, Mara B. Greenberg, Catherine Lee, Amanda L. Ngo, Juanran Feng, Yeyi Zhu, Assiamira Ferrara; Gestational Diabetes, Glycemic Management Trajectories, and Offspring Growth Patterns and Obesity Risk. Diabetes Care 2026; dc251643. https://doi.org/10.2337/dc25-1643
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