Gestational Age Definitions

The American College of Obstetricians and Gynecologists and the Society for Maternal-Fetal Medicine (Year 2013) endorse and encourage the uniform use of new gestational age designations by all clinicians.

Recommended Designations according to the gestational age are – 

  • Late preterm    : 34 0/7 weeks through 36 6/7 weeks
  • Early term         : 37 0/7 weeks through 38 6/7 weeks
  • Full term           : 39 0/7 weeks through 40 6/7 weeks
  • Late term          : 41 0/7 weeks through 41 6/7 weeks
  • Post-term         : 42 0/7 weeks and beyond

Research has shown that neonatal outcomes, especially respiratory morbidity, vary depending on the gestational age at time of birth.

READ Original Publication by ACOG

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