Low birth weight (LBW) is defined as a birth weight of a live-born infant of less than 2,500 grams (5 pounds 8 ounces) regardless of gestational age. LBW can be categorized into very low birth weight (VLBW), which is less than 1,500 grams, and extremely low birth weight (ELBW), which is less than 1,000 grams. The condition is a significant public health issue due to its association with increased mortality and morbidity.
