Which statement about endpoints in an IACUC protocol is correct?

Which statement about endpoints in an IACUC protocol is correct?

• A. Endpoints are optional and rarely used.
• B. Endpoints define when to terminate the study to prevent unnecessary suffering.
• C. Endpoints are only used in statistical analyses.
• D. Endpoints determine the exact daily feeding schedule.

Answer: (B)

End points are predefined criteria that determine when a study should be terminated to prevent or minimize suffering for animal subjects. In an IACUC protocol, humane endpoints guide researchers to take action—often euthanasia—before distress becomes intolerable or unmanageable. This concept is central because it translates the ethical obligation to welfare into concrete, observable signs (like severe weight loss, persistent pain, or signs of distress) and thresholds that trigger a change in the study or humane euthanasia. By establishing these criteria before the study starts, researchers can make objective, timely decisions that protect animals while still allowing valid scientific outcomes. Choosing a humane endpoint supports regulation, welfare, and the pursuit of humane alternatives; it is not optional. Endpoints are not about statistical analyses alone, nor do they dictate routine daily practices like feeding schedules.

End points are predefined criteria that determine when a study should be terminated to prevent or minimize suffering for animal subjects. In an IACUC protocol, humane endpoints guide researchers to take action—often euthanasia—before distress becomes intolerable or unmanageable. This concept is central because it translates the ethical obligation to welfare into concrete, observable signs (like severe weight loss, persistent pain, or signs of distress) and thresholds that trigger a change in the study or humane euthanasia. By establishing these criteria before the study starts, researchers can make objective, timely decisions that protect animals while still allowing valid scientific outcomes.

Choosing a humane endpoint supports regulation, welfare, and the pursuit of humane alternatives; it is not optional. Endpoints are not about statistical analyses alone, nor do they dictate routine daily practices like feeding schedules.