Women consuming high-fat diet during pregnancy may increase the risk of affecting bacteria living in her baby's gut thus impacting proper development of the immune system says a study. The results showed that expecting mothers' diets can lead to distinct changes in their babies' microbiome which could affect energy extraction from food as well as early immunity development. Diet is very amenable to change and women are highly motivated to make healthy changes during pregnancy. Traditionally dietary interventions during pregnancy have focused on micronutrients such as iron and folic acid said Kjersti Aagaard Associate Professor at Baylor College of Medicine