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Abstract

Circulating prostaglandin F2α metabolite (PGFM) after an oxytocin challenge was evaluated throughout the first 2 months of pregnancy in lactating Holstein cows. On day 11, 18, and 25 after artificial insemination (AI), and on days 32, 39, 46, 53, and 60 of pregnancy, cows were challenged with 50 IU ...

Author(s)
Drum, J. N.; Wiltbank, M. C.; Monteiro, P. L. J., Jr.; Prata, A. B.; Gennari, R. S.; Gamarra, C. A.; Canavessi, A. M. O.; Sartori, R.
Publisher
Oxford University Press, Cary, USA
Citation
Biology of Reproduction, 2020, 102, 2, pp 412-423
Abstract

The aim of this study was to test the feasibility of vaginal route in order to apply oxytocin in female bovines using specific formulations. The oxytocin was used in its injectable form (as a comparison standard) and associated with absorption enhancers. Seven formulations containing 5 IU/ml of ...

Author(s)
Netto, C. L. M. P.; Saturnino, H. M.; Paes, P. R. de O.; Duarte, I. D. G.; Keller, K. M.; Viana, F. A. B.
Publisher
Universidade Federal de Goiás, Escola de Veterinária, Goiânia, Brazil
Citation
Ciência Animal Brasileira, 2019, 20, pp e-46960
Abstract

Mechanisms of bovine corpus luteum (CL) maintenance during the second month of pregnancy have not been adequately investigated, despite significant reproductive losses. In the first month, interferon-tau is believed to suppress oxytocin-stimulated prostaglandin F (PGF) production, yet there are...

Author(s)
Mezera, M. A.; Hamm, C. S.; Gamarra, C. A.; Gennari, R. S.; Prata, A. B.; Sartori, R.; Wiltbank, M. C.
Publisher
Oxford University Press, Cary, USA
Citation
Biology of Reproduction, 2019, 101, 1, pp 76-90
Abstract

The dairy cattle has good prospects due to growing demand for food in the country, and Brazilian producers have big challenges ahead, having to produce more and quality. In addition to production techniques, other alternatives such as the use of oxytocin for the milk ejection have been researched....

Author(s)
Spézia, J. P. S.; Okano, W.; Barros, M. P.; Toma, H. S.; Costa, D. S.; Freitas, S. H. de; Camargo, L. M. de; Santos, M. D.
Publisher
Fedearl University of Ceará, Fortaleza, Brazil
Citation
Revista Brasileira de Higiene e Sanidade Animal, 2015, 9, 2, pp 215-222
Abstract

The objective of this study was to evaluate 2 different treatment procedures at the first milking after calving to increase colostrum quantity and to improve colostrum quality in dairy cows. We hypothesized that either exogenous treatment with oxytocin or the presence of the calf at first milking...

Author(s)
Sutter, F.; Borchardt, S.; Schuenemann, G. M.; Rauch, E.; Erhard, M.; Heuwieser, W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 10, pp 9370-9381
Abstract

The physiological aspects of the implementation of the cow milk transfer reflex during machine milking are the result of exposure to the threshold force of a given value of a variable vacuum and simultaneous mechanical irritation by the teat rubber of the udder of the cow udder system. This effect...

Author(s)
Lyubimov, V. E.; Romanov, D. V.; Tsoi, Y. A.; Ziganshin, B. G.; Sitdikov, F. F.
Publisher
EDP Sciences S.A., Les Ulis, France
Citation
BIO Web of Conferences, 2020, 17,
Abstract

The objectives of this study were to investigate the effect of discontinuation of chronic oxytocin supplementation on lactating dairy cows and to determine if there was a difference between methods of discontinuation. The study was conducted on a commercial dairy in central New York milking over...

Author(s)
Leone, W. M.; Nydam, D. V.; Welcome, F.; Warnick, L. D.
Publisher
American Association of Bovine Practitioners, Stillwater, USA
Citation
Bovine Practitioner, 2010, 44, 1, pp 83-87
Abstract

The objective of this study was to determine the effect of administration of oxytocin prior to milking on enzyme activities and thiocyanate concentration in bovine milk. Intramuscular administration of oxytocin (20 IU) was made to a group of cattle comprising 8 animals, whilst a second group was...

Author(s)
Aneela Hameed; Hussain, R.; Tahir Zahoor; Saeed Akhtar; Muhammad Riaz; Tariq Ismail
Publisher
Elsevier, Oxford, UK
Citation
International Dairy Journal, 2014, 39, 2, pp 229-231
Abstract

The aim of this study was to investigate the effects of PGF and oxytocin in vitro on myometrial contractility in puerperal uteri. Thirteen puerperal uteri were removed and perfused after euthanasia of cows with (n=7) and without metritis (n=6). Measurement of uterine contractility was done using...

Author(s)
Heppelmann, M.; Volland, J.; Pfarrer, C.; Kietzmann, M.; Bäumer, W.; Merbach, S.; Schoon, H. A.; Wellnitz, O.; Schmicke, M.; Hoedemaker, M.; Bollwein, H.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2018, 188, pp 144-154
AbstractFull Text

The aim of the present study is to examine the effects of gentamicin sulphate on spontaneous, oxytocin and PGF induced in vitro contractions of myometrium isolated from pregnant cows. Myometrial strips were obtained from healthy pregnant cows and suspended in a covered organ bath filled with...

Author(s)
Yuksel, M.; Ocal, H.; Ayar, A.
Publisher
Polskie Towarzystwo Nauk Weterynaryjnych, Lublin, Poland
Citation
Medycyna Weterynaryjna, 2020, 76, 1, pp 29-33

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