Failure to thrive (FTT), also known as weight faltering or faltering growth, indicates insufficient weight gain or absence of appropriate physical growth in children. FTT is usually defined in terms of weight, and can be evaluated either by a low weight for the child's age, or by a low rate of increase in the weight. The term failure to thrive has been used in different ways, as there is no single objective standard or universally accepted definition for when to diagnose FTT...