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Abstract

In this single herd observational study, there is investigation of the effects of 81 sires (with 11,424 artificial inseminations) on conception rates in 1790 Holstein cows for 5 years. Sires were categorized based on the published sire conception rate (SCR) into different sire fertility groups...

Author(s)
Abdalla, H.; Elghafghuf, A.; Elsohaby, I.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2019, 209, pp 106147
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 aim of this review is to compare the performance of different reproductive programs using natural service, estrus synchronization treatment before natural service (timed natural breeding (TNB)), artificial insemination (AI) following estrus detection and timed artificial insemination (TAI) in...

Author(s)
Baruselli, P. S.; Ferreira, R. M.; SáFilho, M. F.; Bó, G. A.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Animal, 2018, 12, s1, pp s45-s52
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
Abstract

The objective of this study is to apply the bioeconomic model described in a companion study (see Wolfová et al., 2017) for the calculation of the economic weights of traits of pig breeds involved in the three-way crossing system of The Czech National Program for Pig Breeding. Dam breeds, Czech...

Author(s)
Krupa, E.; Krupová, Z.; Wolfová, M.; Žáková, E.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Livestock Science, 2017, 205, pp 70-78
Abstract

This study evaluated effects of equine chorionic gonadotropin (eCG) on fertility of 679 crossbred (Bos taurus × Bos indicus) lactating grazing cows synchronized for fixed-time AI (FTAI). At a random day of the estrous cycle cows received an intravaginal progesterone (P4) implant, 2 mg estradiol...

Author(s)
Prata, A. B.; Pontes, G. C. S.; Monteiro Júnior, P. L. J.; Drum, J. N.; Wiltbank, M. C.; Sartori, R.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 98, pp 36-40
AbstractFull Text

Pig production is an important component of the farming systems that are practised in the northeastern region of India and it has special significance for improving the socio-economic status of tribal farmers in the region. In an effort to optimize the production efficiency of rural pig production...

Author(s)
Kadirvel, G.; Bujarbaruah, K. M.; Suresh Kumar; Ngachan, S. V.
Publisher
South African Society of Animal Science, Hatfield, South Africa
Citation
South African Journal of Animal Science, 2017, 47, 2, pp 140-145
Abstract

Our objectives were to evaluate a fixed-time AI (FTAI) protocol versus a modified estrus detection with fixed-time AI (MTAI) protocol on estrus synchronization and pregnancy rates. Angus-based, crossbred heifers (n=971; 346±14 kg) were estrus synchronized via a melengestrol acetate-prostaglandin F...

Author(s)
Tibbitts, B. T.; Meyer, T. L.; Kelly, D. J.; Funston, R. N.
Publisher
American Registry of Professional Animal Scientists (ARPAS), Champaign, USA
Citation
Professional Animal Scientist, 2017, 33, 1, pp 97-100
Abstract

The present study was designed to determine the effect of estradiol benzoate (EB) on reproductive response following a controlled internal drug release (CIDR) protocol in crossbred (Sahiwal × Friesian) dairy heifers. In the first trial, a total of 100 crossbred dairy heifers were treated with CIDR...

Author(s)
Mehmood, M. U.; Ahmad Qamar; Abdul Sattar; Liaquat Ahmad; Nasim Ahmad
Publisher
Springer, Amsterdam, Netherlands
Citation
Tropical Animal Health and Production, 2017, 49, 2, pp 347-351
Abstract

Antagonistic relationship between milk yield and reproduction is reported in several livestock species. This study aimed to investigate whether genetic merit for milk production in dairy sheep affects responses to superovulation, embryo yield and quality. A total of 21 cross-bred Sarda × Lacaune...

Author(s)
Meraï, A.; Dattena, M.; Casu, S.; Rekik, M.; Lassoued, N.
Publisher
Wiley, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2017, 52, 5, pp 814-818

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