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Animal Science Database

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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
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

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
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 use of tail chalk and estrus/heat expression scores (HEATSC) evaluation is instrumental in identifying cows with greater estrus expression and greater artificial insemination pregnancy rates (P/AI) in cows submitted to timed artificial insemination (TAI), and cows with low or no estrus...

Author(s)
Rodrigues, W. B.; Silva, A. S.; Silva, J. C. B.; Anache, N. A.; Silva, K. C.; Cardoso, C. J. T.; Garcia, W. R.; Sutovsky, P.; Nogueira, E.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Animal, 2019, 13, 10, pp 2313-2318
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
Abstract

Two experiments were conducted to determine relationships of blood metabolite concentrations, BW, BCS, and rump fat depth with postpartum ovulation and pregnancy risks, as well as their utility in predicting those outcomes in suckled beef cows. In experiment 1, plasma glucose collected 10 and 3 d...

Author(s)
Hill, S. L.; Olson, K. C.; Jaeger, J. R.; Stevenson, J. S.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2018, 96, 1, pp 258-272

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