Gestational Age and Size

Maturity by Gestational Age

• • Preterm: <37 wk

  • Term: 37-42 wk

  • Post-term: >42 wk

Birth weight

• • Low birth weight (LBW): <2,500 g

  • Very low birth weight (VLBW): <1,500 g

  • Extremely low birth weight (ELBW): <1,000 g

Birth Weight/Length for Gestational Age

• • Small for gestational age (SGA): Weight or length <2 SD

  • Appropriate for gestational age: Weight or length within 2 SD

  • Large for gestational age: Weight or length >2 SD

  • Asymmetric IUGR (delayed fetal weight gain with sparing of length and head growth) acute malnutrition or placenta! insufficiency: has potential for catch-up growth

  • Symmetric IUGR (delayed fetal weight gain w/ comparable delays of length and head growth) prolonged malnutrition, genetic processes, or congenital anomalies; has less potential for catch-up growth