Three Rs (animal research)
guiding principles for more ethical use of animals in science
The Three Rs (3Rs) are guiding principles for more ethical conduct in product testing and scientific research in relation to the use (or ideally non-use) of animals. They were first described by W. M. S. Russell and R. L. Burch in 1959. The 3Rs are:
Replacement: methods which avoid the use of animals in research
Reduction: use of methods that enable researchers to minimise the number of animals necessary to obtain reliable and useful information.
Refinement: use of methods that alleviate or minimize potential pain, suffering, distress, or lasting harm and improve welfare for the animals used.
The 3Rs have a broader scope than simply encouraging alternatives to animal testing, but aim to improve animal welfare and scientific quality where the use of animals cannot be avoided. In many countries, these 3Rs are now explicit in legislation governing animal use. It is usual to capitalise the first letter of each of the three 'R' principles (i.e. 'Replacement' rather than 'replacement') to avoid ambiguity and clarify reference to the 3Rs principles.
History
In 1954, the Universities Federation for Animal Welfare (UFAW) decided to sponsor systematic research on the progress of humane techniques in the laboratory. In October of that year, William Russell, described as a brilliant young zoologist who happened to be also a psychologist and a classical scholar, and Rex Burch, a microbiologist, were appointed to inaugurate a systematic study of laboratory techniques in their ethical aspects.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 14, 2026. The linked authority identifier is Q15637445. None of the 1 selected statements returned an explicit reference. The first chronological checks are 1959 and 1954.
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This entry incorporates text from “Three Rs (animal research)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.