Is there circadian variation in cortisol levels in young sows in heart catheterization?

Abstract

Cortisol was measured during four different stages of the experiment at two different times of the day (the operation was performed in the morning or afternoon). To determine circadian variation the Mann-Whitney test was used; to determine changes in cortisol levels within the experiment the Friedman test was performed.

Keywords

• Cortisol
• circadian variation
• heart cathetrization
• young sows