In vivo refers to conditions, procedures, measurements, or studies conducted within a living organism, such as an animal or human subject, rather than in a laboratory dish or outside a living system. In translation and localization, the term occurs in preclinical study reports, clinical trial protocols, pharmacology and toxicology summaries, and regulatory submissions that distinguish whole-body findings from test-tube results.
In translation and localization, in vivo appears in non-clinical study reports, clinical narratives, pharmacology sections, and regulatory documents. Translators encounter paired terms like in vivo exposure, in vivo efficacy, and in vivo correlation in tables, titles, and data descriptions, requiring consistent distinction from in vitro and ex vivo across study protocols and summaries.
A common error is translating in vivo as 'in the body' in a way that creates awkward phrasing or fails to retain the Latin term recognized in scientific and regulatory texts. Overliteral rendering in study titles can also obscure the contrast with in vitro and ex vivo, which are often used as fixed categories.
FDA, CE/MDR and NMPA reviewers assess the submitted wording itself. Regulatory bodies require traceable, accountable translation, and an inconsistent term can delay or fail a submission.
Angel Translation locks terms like this into a project terminology base before expert review begins, so the same source term resolves to the same target term across every document in a submission — and stays consistent in the next revision. See the 8-step AI + expert workflow.
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