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Gut Microbiota Analysis Enables Early and Non-Invasive Detection of Gestational Diabetes

By LabMedica International staff writers
Posted on 03 Jul 2025

Gestational diabetes mellitus is a common metabolic disorder marked by abnormal glucose metabolism during pregnancy, typically emerging in the mid to late stages. More...

It significantly heightens the risk of complications such as gestational hypertension, polyhydramnios, and cesarean delivery for the mother, while increasing the likelihood of birth asphyxia and long-term health conditions like obesity and diabetes in children. Early diagnosis and intervention are key to reducing these risks, yet current diagnostic methods often detect the disorder only after complications have begun to develop. In a new study, researchers identified early-pregnancy gut microbiota signatures that may serve as predictive biomarkers, paving the way for non-invasive early diagnosis of gestational diabetes.

In the study, researchers from Zhujiang Hospital of Southern Medical University (Guangzhou, China), along with collaborators, analyzed fecal microbiota from 61 pregnant women in their first trimester using 16S rRNA gene sequencing, a method that profiles bacterial communities at high resolution. They then correlated these microbiome profiles with oral glucose tolerance test results conducted between 24 to 28 weeks of gestation and with recorded clinical delivery outcomes. Through this process, the researchers were able to detect gut microbiota dysbiosis associated with the future onset of gestational diabetes. Using genus-level microbial markers, they developed an early diagnostic model designed to identify the condition well before traditional symptoms emerge.

The findings, published in Microbiology Spectrum, revealed significant differences in gut microbiota composition between women who developed gestational diabetes and those who did not. The diagnostic model demonstrated high predictive accuracy, supporting the potential of microbiome-based tools for early, non-invasive detection. The findings suggest that this approach could enable earlier intervention, offering better prevention and personalized care strategies to reduce adverse maternal and fetal outcomes. The researchers plan to refine and validate their model further across larger populations, with the long-term aim of integrating gut microbiota screening into routine prenatal care.

“These findings suggest that microbiota-based tools could enable early, non-invasive detection of gestational diabetes mellitus, offering new opportunities for prevention and personalized management,” wrote the study authors. “This research highlights the role of the gut microbiome in pregnancy and has important implications for improving maternal and fetal health outcomes.”


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