Doctors say it's not how much you are eating but what you eat when pregnant that can make a difference in the health of your baby.
Foods that have been fried, preserved with sugar or processed can look foreign to your baby's body, which can trigger an immune response.
Research shows that, like cigarettes and alcohol, a bad diet has a link to childhood development issues.
When it comes to growing a baby stability is key.
Keeping blood sugar and nutrient levels in a steady, normal range requires a nutritionally steady diet.