Elevated plasma cortisol during spontaneous hypocalcaemia in ruminants has also been shown previously by Horst and Jörgensen [ 26].
Heightened cortisol levels in spontaneous and CO2-provoked attacks [10], [11] have been found to reflect anticipatory anxiety/individual differences in emotionality, rather than the diagnostic category of PD per se.
First, we found similar post-CO2 corticosterone concentrations among RCF and CT mice, and cortisol levels following spontaneous and CO2-provoked attacks do not seem to bear strongly upon the diagnosis of PD in man [4], [10], [11], [13].
Plasma from blood samples from 2 days before, and on Days 3 and 6 after the second spontaneous oestrus were analysed for cortisol concentrations.
A comparison of follistatin-free activin A with other tests that were associated with spontaneous preterm birth (α-fetoprotein, alkaline phosphatase, cortisol, granulocyte colony-stimulating factor, fetal fibronectin, and cervical interleukin-6) was also performed.
In particular with respect to burnout, insufficient information about the defects in cortisol responsiveness and their potential spontaneous normalisation is available.
The maximum average P-cortisol concentration during the second spontaneous oestrus was 15.0 ± 6.7 nmol/l in RBH (3 h after onset of oestrus) while 17.5 ± 10.5 nmol/l in VH (15 h after onset of oestrus) and thus not statistically different from the average concentrations during the first spontaneous oestrus in RBH (P = 0.89) or VH (P = 0.85).
In a prospective cohort study, Tavakoli et al. measured serum cortisol levels 5 min and 1 h after return of spontaneous circulation (ROSC) in 50 successfully resuscitated patients.
Therefore the present study was performed to investigate if spontaneous disease (parturient paresis, metritis, ketosis etc) in dairy cows results in elevated concentrations of glucose and cortisol in blood as cortisol is the major regulator of glucose in ruminants.
The average P-cortisol concentration from a single sample per heifer during the first spontaneous oestrus was 12.2 ± 2.08 nmol/l in RBH and 15.6 ± 4.74 nmol/l in VH (P = 0.53).
