Potatoes are rich in iron, calcium, and potassium that ensure maximum development of the fetus. They are also packed with folate which reduces the chance of neural tube defects like spina bifida in the unborn baby. Known for their carbohydrate content, potatoes are a source of energy to the expecting mother, depending on the stage of the pregnancy. However, you must keep away from green potatoes as they contain toxins which are known to be harmful for your fetus. They can cause potential defects like spina bifida in the newborn baby. Green potatoes are also known to trigger type-1 diabetes in children.