Maternal T1D Protection and Intrauterine Exposure
A study presented at EASD 2026 suggests that intrauterine exposure to maternal type 1 diabetes provides a relative protective effect against offspring developing the condition. Researchers analyzed data from 3.8 million births to confirm that this protection is linked to maternal diagnosis timing.
Why it matters
Understanding the biological mechanisms of diabetes transmission can lead to better preventative strategies and prenatal care.
RESULTS from a new study presented at EASD 2026 confirmed that maternal type 1 diabetes (T1D) confers relative protection against offspring T1D and revealed that protection requires intrauterine exposure to maternal T1D. Results also showed that offspring of parents with type 2 diabetes (T2D) had a lower baseline risk of T1D than offspring of parents with T1D, although this analysis was subject to greater uncertainty.
There is uncertainty as to why T1D risk is lower in those who have mothers with T1D in comparison to those who have fathers or siblings with T1D. As a result, researchers aimed to understand the relative importance of intrauterine exposure to maternal hyperglycaemia. Specifically, the authors assessed whether relative maternal protection is conferred to offspring in other forms of diabetes and whether maternal protection is only observed in individuals whose mothers were diagnosed before birth.
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