Age terminology during the perinatal period

Consistent definitions to describe the length of gestation and age in neonates are needed to compare neurodevelopmental, medical, and growth outcomes. The purposes of this policy statement are to review conventional definitions of age during the perinatal period and to recommend use of standard terminology including gestational age, postmenstrual age, chronological age, corrected age, adjusted age, and estimated date of delivery.

Published by Pediatrics, 2004. The guideline itself is at the source linked here.

doi.org/10.1542/peds.2004-1915