Spitting up is the mild vomiting or regurgitation of food, milk, and saliva that can occur in infants. An immature valve between the stomach and esophagus allows food to travel up the esophagus, which causes spitting up. Treatment may involve feeding the infant more slowly, burping the infant frequently, and keeping the infant upright for 15 minutes after feeding.
Babies grow and develop rapidly over the first year of life, reaching a number of physical, mental, emotional, verbal, and social milestones. These milestones generally occur at the same rate and in the same order among all infants.