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Animal Science Database

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Abstract

The principle of ovsynch-timed artificial insemination and the methods and reproductive application of estrus synchronization and ovsynch-timed artificial insemination in dairy cattle were summarized. Accurate and timely estrus detection of dairy cattle in their estrus cycle was the foundation for ...

Author(s)
Zhao MingLi; Zhang Shen; Hao HaiSheng; Zhao XueMing; Du WeiHua; Wang Dong; Zhu HuaBin
Publisher
Guoji Shudian (Institute of Scientific and Technological Information of China, China Publications Centre), Beijing, China
Citation
Chinese Journal of Animal Science, 2015, 51, 17, pp 80-86
Abstract

The objective was to determine the efficiency of insemination with sexed semen at spontaneous estrus and synchronisation of ovulation, and the effects of days in milk, insemination number, parity, and daily milk yield on pregnancy rates in lactating Holstein cows. A total 1,000 first to fourth...

Author(s)
Kurykin, J.; Jalakas, M.; Kaart, T.; Jaakma, Ü.
Publisher
Lietuvos Veterinarijos Akademija, Kaunas, Lithuania
Citation
Veterinarija ir Zootechnika, 2017, No.75, pp 30-35
AbstractFull Text

The study was conducted to evaluate the conception rate of heifers and multiparous cows based on different Holstein bulls used for artificial insemination (AI). The effects of the type of management AI, animal category, and season of the year were also examined. A three-year database on the...

Author(s)
Luz, G. B.; Maffi, A. S.; Farias, L. B.; Xavier, E. G.; Lima, M. E.; Corrêa, M. N.; Brauner, C. C.
Publisher
Universidade Federal do Rio Grande do Sul, Faculdade de Veterinária, Porto Alegre, Brazil
Citation
Acta Scientiae Veterinariae, 2018, 46, pp 1552
Abstract

Oestrous synchronization using intravaginal sponge with artificial insemination improved fertility in repeater cow under field condition.

Author(s)
Thangadurai, R.; Venilla, M. A.; Shanmugam, P. S.
Publisher
Indian Veterinary Association, Chennai, India
Citation
Indian Veterinary Journal, 2019, 96, 3, pp 80-81
AbstractFull Text

Most fixed-time artificial insemination (FTAI) protocols utilize progesterone (P4) as a hormonal source to achieve synchronization of estrus in cattle. The use of an injectable P4 source to control estrus would be an interesting pharmacological strategy owing to the practicality of parenteral...

Author(s)
Campos, J. T.; Morotti, F.; Bergamo, L. Z.; Costa, C. B.; Seneda, M. M.
Publisher
Universidade Estadual de Londrina, Londrina, Brazil
Citation
Semina: Ciências Agrárias (Londrina), 2016, 37, 4, pp 1991-1996
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
Abstract

The research were realized in the dairy cattle farm from S.C.D.C.B. Dancu, Iasi, on an experimental lot, composed of 41 cows of Romanian Black Spotted breed (BNR), (Lot E), compared to a control group composed of 45 cows (Lot M). The purpose of this study was to determine the effectiveness of using ...

Author(s)
Ruginosu, E.; Borș, S. I.; Creangă, Ș.; Dascălu, D. L.; Davidescu, M. A.
Publisher
Universitatea de Științe Agricole și Medicina Veterinara "Ion Ionescu de la Brad" Iași, Iași, Romania
Citation
Lucrări Științifice - Medicină Veterinară, Universitatea de Științe Agricole și Medicină Veterinară "Ion Ionescu de la Brad" Iași, 2017, 60, 3, pp 338-345
Abstract

The objective of this study was to evaluate the conception rate of crossbred heifers (n=50) and cows (n=50) inseminated with sexed and conventional semen between 18 and 24 hours after estrous detection. The synchronization protocol of the estrous cycle started on day zero (D0) by inserting the...

Author(s)
Peres, A. R.; Ifran, A. M.; Lima, M. R. de; Rossi, G. F.; Corrêa, R. R.; Garcia, J. M.
Publisher
Faculdade de Veterinaria, Universidade Federal Fluminense, Niterói, Brazil
Citation
Revista Brasileira de Ciência Veterinária, 2016, 23, 3/4, pp 186-190
AbstractFull Text

The success of a fixed-time artificial insemination (FTAI) program depends on a high ovulation rate during a short interval. Equine chorionic gonadotropin (eCG) has been used in FTAI protocols to improve follicular growth and thereby to produce larger, more responsive follicles for ovulation with...

Author(s)
Manshadi, M. M.; Rastegarnia, A.; Sani, S. E.
Publisher
Islamic Azad University, Rasht, Iran
Citation
Iranian Journal of Applied Animal Science, 2016, 6, 3, pp 557-562
Abstract

To investigate the influence of the age of bulls at semen production on the non-return rate 56 days after first insemination 39 AI-bulls were investigated. Because of the small sample size for the individual ejaculates the non-return rate included data from first to third breeding services. These...

Author(s)
Melbaum, J.; Schwerhoff, M.; Gehrmeyer, D.; Melbaum, H.; Wassmuth, R.
Publisher
Eugen Ulmer KG, Stuttgart, Germany
Citation
Züchtungskunde, 2016, 88, 5, pp 371-378

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