<prompt> Definition of low birth weight:Wt 2.5kgWt 2kgWt 1.5kgWt 1 kg  <response>: Ref: Nelsons Textbook of Pediatrics. 19th EditionExplanation:Some important definitions in Neonatology Low birth weight: Birth weight of less than 2.5 kg irrespective of gestational age Very low birth weight: Birth weight of less than 1.5 kg irrespective of gestational age.Extremely low birth weight: Birth weight of less than 1.0 kg irrespective of gestational ageNeonatal: First 28 days of postnatal life.Preterm: Less than 37 completed weeks of gestationsTerm: After 37 completed weeks of gestationsPost term: After 42 completed weeks of gestationsPast Dates: After 40 completed weeks of gestationsStill birth: Delivering dead fetus after 28 weeks of gestation. Defn changes with countryAbortion: Expulsion of products of conception before 28 weeks of gestation.Small for Gestational Age SGA: Weight below the I Oth percentile for the gestational age Large for Gestational Age LGA: Weight above the 90th percentile for the gestational age Appropriate for Gestational Age AGA: Weight between 10lh 90th percentile for the gestational age 