Title: neonate
Long Title: IUPAC Gold Book - neonate
DOI: 10.1351/goldbook.10997
Status: current

Definition
Newborn animal or human infant during the first four weeks of postnatal life.

Note
For statistical purposes, some scientists have defined the period as the first seven days of human postnatal life. The precise definition varies from species to species.

Related Term
- postnatal: https://goldbook.iupac.org/terms/view/11111

Source
- PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 783 (https://doi.org/10.1515/pac-2015-1202)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/10997/html
- json: https://goldbook.iupac.org/terms/view/10997/json
- xml: https://goldbook.iupac.org/terms/view/10997/xml

Citation: Citation: 'neonate' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.10997
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Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-05-14T14:28:08+00:00