Final answer:
Low birthweight is defined as a newborn weighing less than 2,500 grams. It can be caused by maternal undernutrition and intrauterine growth restriction. Low birthweight can lead to increased susceptibility to disease and developmental delays.
Step-by-step explanation:
Low birthweight is defined as a newborn that weighs less than 2,500 grams (5.5 lb). Low birthweight may be caused by maternal undernutrition and intrauterine growth restriction. Babies with low birthweight are more susceptible to disease and more likely to die in infancy. In children that survive infancy, low birthweight may result in slow growth and developmental delays throughout early childhood.