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Abstract

The aim of this study was to compare 2 reproductive programs for the management of first postpartum artificial insemination (AI) based on activity monitors and timed AI, as well as to determine the effect of health-related factors on detection and expression of estrus. Lactating Holstein cows...

Author(s)
Burnett, T. A.; Madureira, A. M. L.; Silper, B. F.; Fernandes, A. C. C.; Cerri, R. L. A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 6, pp 5005-5018
Abstract

Expression of estrus after PG and before fixed-time AI has been reported to change the uterine environment, increase accessory sperm numbers, fertilization rates, and overall embryo survival. Thus, expression of estrus can strongly impact overall pregnancy success. Because of variation in...

Author(s)
Richardson, B. N.; Hill, S. L.; Stevenson, J. S.; Djira, G. D.; Perry, G. A.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2016, 166, pp 133-140
Abstract

The performance of dairy herds is affected mainly by factors related to cows' characteristics and herd management practices. However, these factors are interrelated, and as such, the estimation of their individual effect on the performance of dairy herds remains difficult. The aim of this study was ...

Author(s)
Bekara, M. E. A.; Bareille, N.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 10, pp 9435-9457
AbstractFull Text

This study evaluated the effect of a once-used progesterone (P4) intravaginal device (PRID) associated with four different shortened P4-based estrus synchronization (ES) protocols on estrous response (ER) and pregnancy per AI (P/AI) in cyclic and acyclic lactating dairy cows. Cows (n=465) were...

Author(s)
López-Helguera, I.; López-Gatius, F.; Garcia-Ispierto, I.; Serrano-Perez, B.; Colazo, M. G.
Publisher
National Research Institute of Animal Production, Kraków, Poland
Citation
Annals of Animal Science, 2017, 17, 3, pp 757-770
Abstract

The main objective of implementing embryo transfer in beef operations is to accelerate the rate of genetic progress in the herd. Among the main factors that affect the use of these technologies are related to nutrition, management and estrus synchronization. As a result of research conducted over...

Author(s)
Bó, G. A.; Cedeño, A.
Publisher
Colégio Brasileiro de Reprodução Animal, Belo Horizonte, Brazil
Citation
Animal Reproduction (Belo Horizonte), 2018, 15, 3, pp 224-230
Abstract

To increase the efficiency of artificial insemination (AI) and improve reproductive performance of dairy cattle, different governmental organizations (GOs) and non-governmental organizations (NGOs) have been conducting field level estrus synchronization followed by AI in different locations in...

Author(s)
Gatew, H.; Zewde, T.; Kassa, G.; Chanyalew, Y.; Gazu, L.
Publisher
Academic Journals, Lagos, Nigeria
Citation
International Journal of Livestock Production, 2018, 9, 1, pp 9-16
Abstract

Good reproduction is key for successful dairy farming. Detection of estrus is the first step in getting a cow pregnant. Visual detection of estrus is a challenging job, to aid the farmer, estrus detection tools (EDT), such as pedometers, neck mounted collars to measure activity and pressure sensing ...

Author(s)
Roelofs, J. B.; Erp-van der Kooij, E. van
Publisher
Colégio Brasileiro de Reprodução Animal, Belo Horizonte, Brazil
Citation
Animal Reproduction (Belo Horizonte), 2015, 12, 3, pp 498-504
Abstract

Reproductive performance is an important factor affecting the profitability of dairy farms. Optimal fertility results are often confined by the time-consuming nature of classical heat detection, the fact that high-producing dairy cows show estrous symptoms shorter and less clearly, and the...

Author(s)
Adriaens, I.; Huybrechts, T.; Geerinckx, K.; Daems, D.; Lammertyn, J.; Ketelaere, B. de; Saeys, W.; Aernouts, B.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 103, pp 44-51
Abstract

Identifying cows in estrus remains a challenge on dairy cattle farms, and tools and technologies have been developed and used to complement or replace visual detection of estrus. Automated activity monitoring (AAM) systems and timed artificial insemination (TAI) are technologies available to dairy...

Author(s)
Denis-Robichaud, J.; Cerri, R. L. A.; Jones-Bitton, A.; LeBlanc, S. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 1, pp 624-636
Abstract

Automation and information are the important development directions of technologies in dairy industry. To break through the bottleneck of automatically monitoring technology for quiet estrus cows, the regulation pattern of body temperature has become another study focus related to reproductive...

Author(s)
Li XiaoJun; Wang ZhenLing; Chen XiaoLi; Kou HongXiang; Li XiuLing; Wang Yan; Wang Dong
Publisher
Guoji Shudian (Institute of Scientific and Technological Information of China, China Publications Centre), Beijing, China
Citation
Acta Veterinaria et Zootechnica Sinica, 2016, 47, 12, pp 2331-2341

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