You’re right that the average woman needs about 300 extra calories per day during her second and third trimesters. It’s important to remember that this doesn’t mean you should go crazy and eat anything and everything you see. Instead, you should make conscious, healthy choices to eat a variety of whole grains, lean proteins, and fresh produce to support successful pregnancy nutrition.
Three hundred calories isn’t really that much food. Many people are surprised when they see a 300-calorie portion. You could have a few slices of low-fat cheese and five or six whole wheat crackers, an 8-ounce smoothie made with fruit and milk or a large handful of trail mix, and you’d be eating about 300 calories.