Fixed-time AI protocols replacing eCG with a single dose of FSH were less effective in stimulating follicular growth, ovulation, and fertility in suckled-anestrus Nelore beef cows
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TL;DR: In conclusion, FSH failed to stimulate final follicular growth, ovulation, and conception rate in sucked-anestrous beef cows submitted to TAI as effectively as eCG, however, physiological effects of eCG seem to be more evident in cows with a lesser BCS.
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About: This article is published in Animal Reproduction Science. The article was published on 01 Mar 2011. and is currently open access. The article focuses on the topics: Estradiol cypionate & Ovulation.
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Citations
Effects of equine chorionic gonadotropin on follicle development and pregnancy rates in suckled beef cows with or without calf removal
G. H. L. Marquezini,Vitor R G Mercadante,K. C. Olson,John R. Jaeger,George A. Perry,Jeffrey S. Stevenson,G. C. Lamb +6 more
TL;DR: It is concluded that eCG increased DF diameter and CR resulted in a greater percentage of cows experiencing LH peak before 72 h after PGF(2α) and ovulation response; however, eCG failed to improve PR to timed AI.
25
Comparison of two timed artificial insemination system schemes to synchronize estrus and ovulation in Nellore cattle
Marcos Vinícius de Castro Ferraz Júnior,Alexandre Vaz Pires,Marcos Vinicius Biehl,M. H. Santos,José Paulo Roman Barroso,José Renato Silva Gonçalves,Roberto Sartori,Michael L. Day +7 more
TL;DR: In this paper, the authors evaluated the reproductive performance of 411 Nellore cows submitted to the 5dCO-Synch+P4 or 7dEB-+-P4 systems.
23
Comparison of the effects of two shortened timed-AI protocols on pregnancy per AI in beef cattle
K. Macmillan,M. Gobikrushanth,Albina Sanz,D. Bignell,G. Boender,L. Macrae,Reuben J. Mapletoft,M.G. Colazo +7 more
TL;DR: In summary, the J-synch protocol resulted in greater P/AI than the modified 5-day Co- synch protocol in heifers and cows.
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Effect of body condition score and reuse of progesterone-releasing intravaginal devices on conception rate following timed artificial insemination in Nelore cows.
LL Pereira,AP Ferreira,William Gomes Vale,LR Serique,Kal Neves,Adriana Caroprezo Morini,Bruno Moura Monteiro,Ahh Minervino +7 more
TL;DR: Investigating the efficiency of timed artificial insemination through the progesterone-releasing intravaginal device (PRID), used in new condition and for the second and third times in Nelore cows found that under tropical conditions, animals with BCS greater than 2.5 had a higher CR, and the CR decreased proportionally with the number of times that the PRID had been used.
20
Impact of probing the reproductive tract during early pregnancy on fertility of beef cows.
Guilherme Pugliesi,S. C. Scolari,Fernando Silveira Mesquita,M. Maturana Filho,E. R. Araújo,D Cardoso,José Nélio Souza Sales,Ian Martin,M. F. Sá Filho,Cláudia Maria Bertan,Mario Binelli +10 more
TL;DR: In conclusion, uterine flushing and endometrial biopsy negatively affect pregnancy rates, but neither procedure can be considered to be incompatible with pregnancy maintenance.
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References
Reduction in size of the ovulatory follicle reduces subsequent luteal size and pregnancy rate
José Luiz Moraes Vasconcelos,José Luiz Moraes Vasconcelos,Roberto Sartori,Henrique Nunes de Oliveira,J.G. Guenther,Milo C. Wiltbank +5 more
TL;DR: In conclusion, ovulation of smaller follicles produced lowered fertility possibly because development of smaller CL decreased circulating progesterone concentrations.
570
The use of hormonal treatments to improve reproductive performance of anestrous beef cattle in tropical climates.
TL;DR: The addition of an eCG treatment at the time of device removal, which increased plasma progesterone concentrations and pregnancy rates in anestrous postpartum suckled B. indicus cows, may be useful to improve reproductive performance of beef cattle in tropical climates.
562
Relationship between maternal endocrine environment, early embryo development and inhibition of the luteolytic mechanism in cows
George E Mann,G.E. Lamming +1 more
TL;DR: The successful maternal recognition of pregnancy in cows depends on the presence of a sufficiently well developed embryo producing sufficient quantities of IFN-tau, which is, in turn, dependent on an appropriate pattern of maternal progesterone secretion.
Pattern and manipulation of follicular development in Bos indicus cattle.
TL;DR: Exogenous control of luteal and follicular development facilitates the application of assisted reproductive technologies in B. indicus cattle by offering the possibility of planning AI programs without the necessity of oestrus detection and without sacrificing the overall results.
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