The neonatal period is exactly four weeks or 28 completed days, commencing on the date of birth (day 0) and ending on the completion of day 27. For example, a baby born on 1 October remains a neonate until completion of the four weeks on 28 October and is no longer a neonate on 29 October.
Source and reference attributes
Submitting organisation:
National Perinatal Data Development Committee
National Perinatal Data Advisory Committee
Origin:
National Health Data Committee
International Classification of Diseases and Related Health Problems, 10th Revision, WHO, 1992