http://www.babycenter.com/eating-for-two guidelines BabyCentre.com essential pregnancy nutrients eat for two additional calories add about 340 calories per day BabyCenter: What Eating for Two Really Means Babycente 350 calories per day needs an extra 300 calories a day a limited number of “extra” calories per day 450 extra calories per day http://www.babycenter.com/eating-for-two add about 340 calories per day