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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

Donkey farming is expanding because of the rediscovery of nutritional properties of jennies' milk for human consumption. In livestock, timed artificial insemination (TAI) allows to manage big herds without estrus detection, but there are very few studies on estrus synchronization in jennies. The...

Author(s)
Fanelli, D.; Tesi, M.; Rota, A.; Beltramo, M.; Camillo, F.; Panzani, D.
Publisher
Elsevier, New York, USA
Citation
Journal of Equine Veterinary Science, 2019, 74, pp 36-41
Abstract

Using a 5-d controlled internal drug-release (CIDR)-Cosynch resynchronization protocol, the objective of this study was to determine the effect of the initial GnRH injection on pregnancy per artificial insemination (P/AI) to the second artificial insemination in lactating Holstein dairy cows. On...

Author(s)
Spencer, J. A.; Carnahan, K.; Shafii, B.; Price, W. J.; Dalton, J.; Ahmadzadeh, A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 9, pp 8524-8531
Abstract

The objective of this study was to determine the relative importance and contribution of several physiological factors as predictors of pregnancy risk in an Ovsynch (GnRH-1-7 d-PGF-56 h-GnRH-2-16 h-artificial insemination) timed artificial insemination program: (1) age of the corpus luteum (CL;...

Author(s)
Stevenson, J. S.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 12, pp 10077-10092
Abstract

Our objective was to compare the insemination dynamics and time to pregnancy for up to 100 d after the beginning of the artificial insemination period (AIP) for heifers managed with first artificial insemination (AI) service programs that relied primarily on insemination at detected estrus (AIE)...

Author(s)
Masello, M.; Perez, M. M.; Granados, G. E.; Stangaferro, M. L.; Ceglowski, B.; Thomas, M. J.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 2, pp 1671-1681
Abstract

The establishment of pregnancy following insemination is the primary definition of fertility in most dairy systems. Highly fertile cows establish pregnancy sooner after calving and require fewer inseminations than lower-fertility cows. Pregnancy occurs through a series of individual events in...

Author(s)
Lucy, M. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 4, pp 3706-3721
AbstractFull Text

The objective of this study was to evaluate the effect of a second prostaglandin F (PGF) treatment during Ovsynch on luteal regression and fertility in dairy cows, compared with standard Ovsynch. The study was conducted on 111 Holstein Friesian multiparous cows on commercial dairy farm. The...

Author(s)
Nowicki, A.; Barański, W.; Tobolski, D.; Zduńczyk, S.; Janowski, T.
Publisher
Polish Academy of Sciences, Committee of Veterinary Sciences, Olsztyn-Kortowo II, Poland
Citation
Polish Journal of Veterinary Sciences, 2019, 22, 1, pp 157-161
Abstract

Artificial insemination (AI) in domestic animals is an important tool to maximise the use of genetically superior males and thereby insure rapid genetic progress. However, the application of AI in camelids has been hindered by the difficulties involved in collecting, as well as handling the semen...

Author(s)
Skidmore, J. A.; Malo, C. M.; Crichton, E. G.; Morrell, J. M.; Pukazhenthi, B. S.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2018, 194, pp 11-18
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 study was to compare conception rates of female beef cattle inseminated at a fixed-time with either conventional (CON) or SexedUltraTM sex-sorted (SU) semen. Treatments included CON or SU with two sires represented within each treatment. Cows (n=316) and heifers (n=78) from...

Author(s)
Crites, B. R.; Vishwanath, R.; Arnett, A. M.; Bridges, P. J.; Burris, W. R.; McLeod, K. R.; Anderson, L. H.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 118, pp 126-129

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