Lifestyle classes before pregnancy to prevent diabetes and obesity

This trial is testing whether the National Diabetes Prevention Program (NDPP)—a proven healthy lifestyle program—can help women reduce their weight and diabetes risk *before* they become pregnant. The study focuses on women who are overweight or have obesity and may want to have children in the next two years. Researchers believe that starting this program before pregnancy, rather than after, may help break a cycle where a mother's weight and diabetes risk get passed on to her children.

Many pregnant women struggle with obesity and diabetes, which can affect their babies' health for life. Most programs wait until a woman is already pregnant to help her, but by then it may be too late. This trial exists to see if getting help *before* pregnancy—when a woman is planning to conceive—can make a bigger difference for both mother and baby, especially for women from communities that have been underserved by previous research.