Define refinement and give a practical example.

• A. Minimizing pain/distress through better procedures; example: using minimally invasive techniques or better analgesia
• B. Replacing animals with alternatives
• C. Reducing the number of animals used
• D. Using animals beyond their required number

Answer: (C)

Refinement focuses on minimizing pain, distress, and discomfort for animals used in research by improving procedures, techniques, and care. A practical example is adopting less invasive surgical methods and ensuring effective analgesia and anesthesia, along with better handling, improved housing, and clear humane endpoints so animals experience less suffering during and after procedures.

Replacement means using non-animal methods when possible; reduction means using fewer animals overall; using more animals than necessary would contradict these principles.