Unintentional periconceptional exposure to glucagon-like peptide-1 receptor agonists and adverse pregnancy outcomes: A nationwide cohort study in Taiwan
Abstract
Aims: To assess whether periconceptional exposure to glucagon-like peptide-1 receptor agonists (GLP-1 RAs) is associated with adverse outcomes in women with pregestational type 2 diabetes.
Materials and methods: We linked Taiwan's Birth Certificate Application and National Health Insurance claims (2013-2022) to assemble a nationwide cohort of singleton births to mothers (18-50 years) with pregestational diabetes. Exposure was any GLP-1 RA dispensed during the 90 days before and after the last menstrual period; insulin without GLP-1 RA was the active comparator. Outcomes were major congenital malformations, stillbirth, preterm birth (<37 weeks) and small for gestational age (SGA, <10th percentile). We used 1:4 propensity-score matching and Poisson generalised estimating equation (GEE); sensitivity analyses required ≥2 prescriptions and restricted exposure to the first trimester.
Results: We identified 3351 comparison pregnancies (GLP-1 RA 160; insulin 3191); matching yielded 160 versus 606. Risk ratios (GLP-1 RA vs. insulin) were malformations 0.64 (95% confidence interval 0.11-3.83), stillbirth 2.05 (0.82-5.13), preterm birth 1.09 (0.85-1.39) and SGA 0.86 (0.31-2.41). Sensitivity analyses were similar.
Conclusions: Periconceptional GLP-1 RA exposure was not associated with increased risks of malformations, stillbirth, preterm birth or SGA versus insulin use. These preliminary data require confirmation in larger agent-specific studies; until then, intentional GLP-1 RA use in…
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Evidence Hub reads this as a cohort study, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence.
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