If you are obese, are you more likely to have an obese baby due to your actual size or due to the stuff in your diet?

Various factors: A baby that measures large can be due to a number of factors such as genetics, diabetes in the mother (particularly if not controlled well) or excessive weight gain in the mother. If a mother is obese, then she is at an increased risk for diabetes; if she is not diabetic and minimizes her weight gain under md supervision, her baby frequently is normal weight.

Diet: There is good evidence that excessive weight gain during pregnancy may lead to macrosomic, or large babies. So eat a balance healthy diet while pregnant.