Raisins are highly nutritious and a great addition to your pregnancy diet. They are packed with vitamins and minerals necessary for a healthy pregnancy. Raisins also have riboflavin, a nutrient essential for producing energy in your body. It also helps in the bone, muscle and nerve development of your unborn child. Riboflavin deficiency in pregnant women can increase the risk of preclampsia. Hence, it is important that you get your regular intake of 1.4 mg of riboflavin when you are expecting. And, raisins are a good way to include this nutrient.