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Abstract

This experiment was designed to compare pregnancy rates in postpartum beef cows following split-time (STAI) or fixed-time (FTAI) artificial insemination. Estrus was synchronized for 671 cows at seven locations following administration of the 7-d CO-Synch + CIDR protocol (100 µg GnRH+CIDR insert...

Author(s)
Bishop, B. E.; Thomas, J. M.; Abel, J. M.; Poock, S. E.; Ellersieck, M. R.; Smith, M. F.; Patterson, D. J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 99, pp 48-52
AbstractFull Text

The future of beef cattle and consequently its profitability are tied to the optimization of land use, since in many states its area has been occupied by agriculture. One of the alternatives is the use of breeding biotechnologies, such as fixed-time artificial insemination [FTAI], which allows the ...

Author(s)
Santos, G. dos; Tortorella, R. D.; Fausto, D.
Publisher
Instituto Pecege, Piracicaba, Brazil
Citation
Revista iPecege, 2018, 4, 1, pp 28-32
Abstract

Two experiments were conducted with the aim of determining the effect of equine chorionic gonadotropin (eCG) administration on day 14 after insemination on ovarian response and pregnancy establishment in postpartum anestrous beef cows. In both experiments, cows were subjected to a progesterone- and ...

Author(s)
Núñez-Olivera, R.; Castro, T. de; Bó, G. A.; Piaggio, J.; Menchaca, A.
Publisher
Elsevier Inc, New York, USA
Citation
Domestic Animal Endocrinology, 2018, 62, pp 24-31
Abstract

This study aimed to clarify the feasibility of a novel timed artificial insemination (TAI) protocol using ultrasonography, and to determine the associations between the ovarian component and fertility. In Experiment 1, 272 Japanese Black cows with a corpus luteum (CL) ≥18 mm in diameter were...

Author(s)
Funakura, H.; Shiki, A.; Tsubakishita, Y.; Mido, S.; Katamoto, H.; Kitahara, G.; Osawa, T.
Publisher
Society for Reproduction and Development, Tokyo, Japan
Citation
Journal of Reproduction and Development, 2018, 64, 2, pp 109-115
Abstract

An experiment was designed to compare fertility of SexedULTRA 4 MTM sex-sorted semen and conventional, non-sex-sorted semen following either fixed-time artificial insemination (FTAI) or split-time artificial insemination (STAI) of mature suckled beef cows. Units of sex-sorted and conventional semen ...

Author(s)
Thomas, J. M.; Locke, J. W. C.; Bonacker, R. C.; Knickmeyer, E. R.; Wilson, D. J.; Vishwanath, R.; Arnett, A. M.; Smith, M. F.; Patterson, D. J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 123, pp 100-107
Abstract

The objective of this trial was to evaluate different post-timed artificial insemination (TAI) reproductive managements in postpartum beef cows to produce crossbred calves from artificial insemination (AI). Nellore cows (n=607), with 45 days postpartum, were inseminated at a fixed time, using a...

Author(s)
Rodrigues, W. B.; Jara, J. do P.; Borges, J. C.; Oliveira, L. O. F. de; Abreu, U. P. G. de; Anache, N. A.; Silva, K. C. da; Bezerra, A. de O.; Cardoso Junior, C. T.; Nogueira, E.
Publisher
CSIRO, Collingwood, Australia
Citation
Animal Production Science, 2019, 59, 2, pp 225-231
AbstractFull Text

The objective of the present work was to evaluate the effect of treatment of estrus cycle control (Co-Synch 5 days; J-Synch or Device by 7 days), reproductive status (cyclic or anestrus) and equine chorionic gonadotropin (eCG) on pregnancy rate after fixed time artificial insemination (FTAI). Angus ...

Author(s)
Erbiti, F.; Lissarrague, C.; Cabodevila, J.; Callejas, S. S.
Publisher
Facultad de Ciencias Veterinarias de la Universidad Nacional del Nordeste (UNNE), Corrientes, Argentina
Citation
Revista Veterinaria, 2018, 29, 1, pp 35-39
Abstract

The effects of eCG on follicular growth, ovulation, and pregnancy per artificial insemination (P/AI) in multiparous and primiparous Bos indicus beef cows submitted to timed artificial insemination (TAI) were evaluated in three experiments. In experiments 1 (follicular responses; n=64), 2...

Author(s)
Sales, J. N. S.; Bottino, M. P.; Silva, L. A. C. L.; Girotto, R. W.; Massoneto, J. P. M.; Souza, J. C.; Baruselli, P. S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 86, 9, pp 2290-2295
Abstract

Eighteen beef cows with their calves were assigned to 3 groups considering body conditions scores at calving (BCSC): T1 (high BCSC, maintained throughout the study); T2 (low BCSC, increased during the study); and T3 (low BCSC, maintained throughout). An estrus synchronization protocol was...

Author(s)
Domínguez-Muñoz, M. A.; Guerra-Puga, J. A.; Berrones-Morales, H. G.; López-Zavala, R.; Salinas-Chavira, J.
Publisher
Taylor & Francis, Abingdon, UK
Citation
Acta Agriculturæ Scandinavica. Section A, Animal Science, 2018, 68, 3, pp 124-133
Abstract

Prostaglandin F (PGF) is commonly injected intramuscularly (IM) in female cattle in synchronization protocols. A novel site for administration of PGF that improves beef quality assurance is the ischiorectal fossa (IRF). The objective of this study was to determine whether administration of...

Author(s)
Holland, S. C.; Whittier, W. D.; Clark, S. G.; Hafez, S. A.; Swecker, W. S.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2018, 198, pp 11-19

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