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When is a cow in estrus? Clinical and practical aspects.
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Relationship between haptoglobin, serum amyloid A, and clinical status in a survey of dairy herds during a 6-month period.
TLDR
Both Hp and SAA had low sensitivity but higher specificity in determining disease status compared with clinical examination in dairy cattle, but further work needs to be done to assess its value as an indicator of herd health.
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Relative accuracy of the identification of ovarian structures in the cow by ultrasonography and palpation per rectum.
TLDR
This review presents the main features of manual and ultrasonographic characteristics of follicles, corpora lutea (with or without a cavity), follicular and lutenized cysts and the reliability of the two methods is compared.
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Factors affecting the response to the specific treatment of several forms of clinical anestrus in high producing dairy cows.
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Effects of ovum pick-up frequency and FSH stimulation: a retrospective study on seven years of beef cattle in vitro embryo production.
TLDR
Comparing the number of follicles, cumulus oocyte complexes (COCs) and cultured In Vitro Produced (IVP) embryos obtained from 1396 non-stimulated Ovum Pick-up (OPU) sessions shows that, expressed per session, FSH stimulation prior to OPU increases production efficiency with significantly more follicles punctured and oocytes retrieved.
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Influence of calving season on the interactions among reproductive disorders of dairy cows.
TLDR
Cows that calved in a cool environment could more effectively cope with reproductive disorders prior to conception and this fact was mainly observed in older cows, while a cool season decreased interactions among reproductive disorders of dairy cows.
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Evaluation of false ultrasonographic diagnoses in cows by measuring plasma levels of bovine pregnancy-associated glycoprotein 1
TLDR
Results showed that before day 31, ultrasonographic scanning was not very sensitive because six of the 30 calving cows were incorrectly diagnosed as non-pregnant, and plasma levels of bPAG-1 and progesterone proved that four of the cows which had early positive Ultrasonographic diagnoses but did not produce a calf, were pregnant when they were examined.
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Comparison of reproductive performance in Belgian dairy and beef cattle.
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Use of transrectal B-mode ultrasound imaging in bovine pregnancy diagnosis
A 3 MHz ultrasonic transducer was used to make pregnancy diagnoses in 320 milk and beef cows and heifers, on average 41 days after the last insemination. The ultrasound diagnostic findings were…
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Electrical and mechanical activity of the cervix in the ewe during pregnancy and parturition.
TLDR
It is concluded that during the last month of pregnancy the cervix is active and that its activity arises from a basic ultradian rhythm involving the entire genital tract.
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