Universiteit Leiden

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Facts and figures

We are transparent about our research involving laboratory animals, which includes providing access to our annual statistics. On this page, you will find an overview of various aspects, such as the number of animals and the species we use, the types of research for which we employ animals, and the level of discomfort experienced by the animals.

Annual figures on animals experiments for Leiden University in 2022

The infographic below presents an overview of the conducted animal experiments in 2023, specifying the types of laboratory animals used. Click on the magnifying glass to view enlarged images. The complete infographic containing the annual animal testing statistics is also available as pdf.

Previous years

Annual reports

Raw data

Here, you can find the raw data of the laboratory animals and experiments that we annually submit to the Dutch Food and Consumer Product Safety Authority (NVWA). The NVWA processes this data in their annual publication ‘Zo doende: Jaaroverzicht dierproeven en proefdieren Zo doende | Dierproeven voor onderzoek | NVWA’ (in Dutch).

 

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