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Animal Science Database

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Abstract

The use of artificial insemination in cows makes possible breeding of superior animals, which are known as enhancer individuals. However, the major limitation for its expansion has been the necessity for estrus detection. Thus, programs of fixed time artificial insemination (FTAI), without the...

Author(s)
Cavalieri, F. L. B.; Colombo, A. H. B.; Andreazzi, M. A.; Gonçalves, É. A.
Publisher
Universidade Federal do Paraná, UFPR, Palotina, Brazil
Citation
Archives of Veterinary Science, 2016, 21, 1, pp 25-31
Abstract

In this study, we examined the locational effect (left or right ovary) of the preovulatory follicle (PF) on fertility in dairy heifers. In total, 1,111 artificial inseminations (AI) were analyzed. At AI, PF locations were examined using rectal palpation, and heifers were divided into two groups on...

Author(s)
Miura, R.; Izumi, T.
Publisher
Wiley, Tokyo, Japan
Citation
Animal Science Journal, 2018, 89, 2, pp 328-331
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
AbstractFull Text

Reproductive failures are often difficult to diagnose. However, use of gestation flow charts and sow card information can be very helpful in determining when problems occurred, and which management phases should be examined. Regular returns to estrus after insemination usually are conception...

Author(s)
Flowers, W. L.
Publisher
London Swine Conference, London, Canada
Citation
Proceedings of the London Swine Conference, 26-27 March 2019, London, Ontario, Canada, 2019, pp 79-84
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

This study was designed to evaluate the reproductive performance of lactating dairy cows (Holstein Friesian) after the injection of PGF analogue on Day 15 postpartum, and GnRH analogue on Day 23 after artificial insemination (AI) with Presynch (two injections of PGF, administered 14 days apart...

Author(s)
Akbarabadi, M. A.; Shabankareh, H. K.; Abdolmohammadi, A.; Shahsavari, M. H.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2014, 82, 3, pp 509-516
Abstract

This study examines the possible effects on the reproductive performance of high-producing dairy cows of progesterone (P4) given in the early luteal phase (1.55 g of P4), from Days 3 to 5 post-artificial insemination (AI) as compared with the time of pregnancy recognition, from Days 15 to 17...

Author(s)
Garcia-Ispierto, I.; López-Gatius, F.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 90, pp 20-24
Abstract

The objective of this study was to design an artificial insemination (AI) protocol using cryopreserved spermatozoa to obtain pregnancies in captive Indian rhinoceroses (Rhinoceros unicornis). Four methods developed varied by timing and approach, as follows; Method 1: females (n=2) were inseminated...

Author(s)
Stoops, M. A.; Campbell, M. K.; DeChant, C. J.; Hauser, J.; Kottwitz, J.; Pairan, R. D.; Shaffstall, W.; Volle, K.; Roth, T. L.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2016, 172, pp 60-75
Abstract

Heifers and cows that exhibit estrus before fixed-time AI have increased concentrations of estradiol and greater conception rates compared with those that do not. Our objective was to determine whether small doses of gonadotropin-releasing hormone following controlled internal drug-release insert...

Author(s)
Rich, J. J. J.; Northrop, E. J.; Perkins, S. D.; Perry, G. A.
Publisher
American Registry of Professional Animal Scientists (ARPAS), Champaign, USA
Citation
Professional Animal Scientist, 2018, 34, 6, pp 566-570
Abstract

This study aimed to contribute to understanding the interface between reproductive and nutritional energetic physiology in contemporary dairy cattle. Multiparous Holstein cows (n=32) between 70 and 180 days in milk were used in a study starting 10 d prior to the artificial insemination (AI) date...

Author(s)
Gomez, N. A.; Conley, A. J.; Robinson, P. H.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2018, 189, pp 136-145

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