Stress and behavioural responses to winter shearing differ between pregnant and non-pregnant ewes

Publication date: Available online 16 August 2019Source: Physiology &BehaviorAuthor(s): Rodolfo Ungerfeld, Aline Freitas-de-MeloAbstractHigh progesterone concentrations reduce the stress responses in several mammals. Therefore, it may be expected that pregnant ewes have lower responses to stressors than anoestrous ewes. Our aims were to compare the stress response and the behavioural changes of pregnant and non-pregnant ewes sheared during winter. Two trials were with 20 were pregnant (group PR) and 17 non-pregnant ewes (group NP). In the first trial blood samples were collected immediately before and during the first 180 min after shearing, and cortisol, total protein, and albumin concentrations were measured, and globulin concentrations were calculated. In the second trial, the frequency in which each ewe was observed standing, lying down, walking and grazing were recorded from Day −3 to Day −1 (Day 0 = shearing), from Day 1 to Day 5, on Days 13 and 20–21 during 8 h/day. Scan observations were done every 10 min from 8:00 h to 12:00 h and from 14:00 h to 18:00 h (total = 50 Non-pregnant ewes had greater cortisol concentrations than PR ewes (P = .007). Non-pregnant ewes also had greater total protein concentrations than PR ewes (P = .029). Albumin concentration tended to be greater in NP than PR ewes (P = .064). Globulin concentration 30 min after shearing was greater in PR than in NP ewes (P = .04...
Source: Physiology and Behavior - Category: Physiology Source Type: research

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Source: Dr.Malpani's Blog - Category: Reproduction Medicine Source Type: blogs
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Source: Archives of Gynecology and Obstetrics - Category: OBGYN Source Type: research
The objective was to compare the use of corpus luteum (CL) vascular perfusion to CL diameter and/or echogenicity to diagnose pregnancy at 21 d after timed-AI. Ovaries of Nelore heifers were assessed using ultrasonography in B-mode and color Doppler simultaneously 21 d after timed-AI (n = 113). Objective evaluations were performed using an image processing software to extract the number of colored pixels (ColorPix), diameter (mm) and echogenicity/mm² (EchoPix) of the CL. Subjective evaluations of the CL were performed by five evaluators using scores of estimated vascular perfusion area of color Doppler scan videos ...
Source: Animal Reproduction Science - Category: Zoology Authors: Tags: Anim Reprod Sci Source Type: research
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Source: Acta Obstetricia et Gynecologica Scandinavica - Category: OBGYN Authors: Tags: ORIGINAL RESEARCH ARTICLE Source Type: research
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Source: Acta Odontologica Scandinavica - Category: Dentistry Authors: Tags: Acta Odontol Scand Source Type: research
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Source: Acta Obstetricia et Gynecologica Scandinavica - Category: OBGYN Authors: Tags: SYSTEMATIC REVIEW Source Type: research
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Source: the Mail online | Health - Category: Consumer Health News Source Type: news
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Source: Frontiers in Genetics - Category: Genetics & Stem Cells Source Type: research
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