Heart rate and salivary cortisol concentrations in foals at birth |
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| Institution: | 1. Graf Lehndorff Institute for Equine Science, Vienna University of Veterinary Sciences, Neustadt (Dosse) 16845, Germany;2. Artificial Insemination and Embryo Transfer, University of Veterinary Sciences, Vienna 1210, Austria;3. Obstetrics and Gynaecology, University of Veterinary Sciences, Vienna 1210, Austria;4. Biochemistry, University of Veterinary Sciences, Vienna 1210, Austria;1. Department of Gynecology and Obstetrics, University Hospital, Faculty of Medicine of Ribeirão Preto, FMRP-USP, Ribeirão Preto, SP, Brazil;2. Department of Pediatrics, University Hospital, FMRP-USP, Ribeirão Preto, SP, Brazil;3. Department of Public Health, Federal University of Maranhão, MA, Brazil;4. Department of Gynecology and Obstetrics, University Hospital, FMRP-USP, Ribeirão Preto, SP, Brazil |
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| Abstract: | Heart rate (HR), HR variability (HRV) and salivary cortisol concentrations were determined in foals (n = 13) during the perinatal phase and until 5 months of age. In the fetus, HR decreased from 77 ± 3 beats/min at 120 min before birth to 60 ± 1 beats/min at 5 min before birth (P <0.01). Within 30 min of birth, HR increased to 160 ± 9 beats/min (P <0.01). Salivary cortisol concentrations immediately after birth were 11.9 ± 3.6 ng/mL and within 2 h increased to a maximum of 52.5 ± 12.3 ng/mL (P <0.01). In conclusion, increases in HR and salivary cortisol concentrations in foals are not induced during parturition, but occur immediately after birth. |
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