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Abstract

The aim of this study was to evaluate luteolysis using three doses of PGF on Day 5 or Day 7 of the estrous cycle in nonlactating Nellore (Bos indicus) cows. Cows (n=323) were assigned within date of estrus (Day 0 of estrous cycle) to receive 12.5, 25.0, or 50.0 mg of PGF on either Day 5 or Day...

Author(s)
Ferraz Junior, M. V. C.; Pires, A. V.; Biehl, M. V.; Santos, M. H.; Polizel, D. M.; Nepomuceno, D. D.; Sartori, R.; Barreto Filho, J. B.; Gonçalves, J. R. S.; Day, M. L.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 86, 5, pp 1268-1274
Abstract

In practice, the etiologic treatment of the repeat-breeder cow is nearly infeasible. In this study, we tested the hypothesis that a combined treatment would benefit the conception rate of repeat-breeder cows. The components of this regimen target ovulation defects, late progesterone (P4) rise, and...

Author(s)
Amiridis, G. S.; Tsiligianni, T.; Dovolou, E.; Rekkas, C.; Vouzaras, D.; Menegatos, I.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2009, 72, 4, pp 542-548
Abstract

Author(s)
Dobson, H.
Publisher
BMJ Publishing Group, London, UK
Citation
Veterinary Record, 2016, 178, 11, pp 258-259
Abstract

In the present study we have evaluated a possible stress reaction in response to two different PGF analogs-luprostiol and d-cloprostenol-and their effects on estrous cycle characteristics. In a cross-over-design eight mares received in alternating order either luprostiol (Treatment LUP; 3.75 mg...

Author(s)
Kuhl, J.; Nagel, C.; Ille, N.; Aurich, J. E.; Aurich, C.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2016, 168, pp 92-99
Abstract

The aim of the present study was to evaluate the effects of the PGF treatment given at the onset of a synchronization of ovulation protocol using a norgestomet (NORG) ear implant on ovarian follicular dynamics (Experiment 1) and pregnancy per AI (P/AI; Experiment 2) in cyclic (CL present) Bos...

Author(s)
SáFilho, M. F.; Marques, M. O.; Gimenes, L. U.; Torres Júnior, J. R. S.; Batista, E. O. S.; Carvalho, J. P. B.; Baruselli, P. S.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2014, 144, 1/2, pp 1-5
Abstract

Intrauterine plant oil infusion, including fractionated coconut oil, has been previously found to be a safe, inexpensive, and reversible method of prolonging the luteal phase in mares when administered on Day 10 of the estrous cycle. Our objective was to understand the uteroovarian response to the...

Author(s)
Amorim, M. D. de; Nielsen, K.; Cruz, R. K. S.; Card, C.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 86, 2, pp 545-550
Abstract

Resumption of ovulation after parturition is a coordinated process that involves recoupling of the GH/insulin-like growth factor 1 axis in the liver, increase in follicular development and steroidogenesis, and removal of negative feedback from estradiol in the hypothalamus. Infectious diseases and...

Author(s)
Santos, J. E. P.; Bisinotto, R. S.; Ribeiro, E. S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 86, 1, pp 254-262
AbstractFull Text

In dairy cows and buffaloes, summer heat stress (HS) reduces milk yield and delays return to pregnancy leading to financial loss. Clues for effective interventions against summer infertility (SI) lie in understanding the underlying mechanisms. This article reviews current knowledge on the...

Author(s)
Wakayo, B. U.; Brar, P. S.; Prabhakar, S.
Publisher
Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya
Citation
Open Veterinary Journal, 2015, 5, 1, pp 6-10
AbstractFull Text

Author(s)
Fricke, P. M.
Publisher
North American Veterinary Community (NAVC), Gainesville, USA
Citation
Proceedings of the NAVC Conference, January 17-21, 2015, Orlando, Florida, USA. Volume 29, Large animal edition, 2015, pp 1-3
Abstract

The advent of AI has markedly improved the production potential of dairy cows in all systems of production and transformed the dairy industry in many countries. Unfortunately, for many years breeding objectives focused solely on milk production. This resulted in a major decline in genetic merit for ...

Author(s)
Butler, S. T.
Publisher
CSIRO, Collingwood, Australia
Citation
Reproduction, Fertility and Development, 2014, 26, 1, pp 1-11

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