Most babies, whether breast-fed or bottle fed, swallow air. The air that is swallowed does not cause discomfort, although it could possibly be enough to fill the stomach and prevent the baby from drinking as much as they need for complete satisfaction. It is worthwhile to try burping once or twice during a feeding. If the baby burps readily, they may then eat more. If no burping occurs, a sufficient amount of air has not been swallowed and continued efforts to burp are not necessary.