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Abstract

Artificial insemination in cattle has been used worldwide to improve the genetic gain and reproductive efficiency of the herds. In order to facilitate the use of AI, several protocols for timed artificial insemination (TAI) have been developed, which promote the control of follicular growth and...

Author(s)
Baruselli, P. S.; Catussi, B. L. C.; Abreu, L. Â. de; Elliff, F. M.; Silva, L. G. da; Batista, E. S.; Crepaldi, G. A.
Publisher
Colégio Brasileiro de Reprodução Animal, Belo Horizonte, Brazil
Citation
Revista Brasileira de Reprodução Animal, 2019, 43, 2, pp 308-314
Abstract

The various studies on the manipulation of the estrous cycle culminated in the development of estrous and ovulation synchronization protocols, to the point of defining an optimum moment for artificial insemination. The induction of ovulation is a primordial part for the determination of the moment...

Author(s)
Reis e Silva, O.; Mello, M. R. B. de; Silenciato, L. N.; Ferreira, J. E.; Couto, S. R. B. do; Fajardo, R. S. L.; Resende, O. de A.
Publisher
Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
Citation
Brazilian Journal of Veterinary Research and Animal Science, 2019, 56, 3, pp e155078
Abstract

Causes of low fertility rates of cows (76.2-78.1%) related to viral and bacterial infections, as well as to using of feeds containing mycotoxins, heavy metals and other harmful substances are discussed. It is stated that fertility decreases with the drop in the activity of the endocrine system...

Author(s)
Redkozubova, L.
Publisher
Redaktsiya zhurnala "Zhivotnovodstvo Rossii", Moscow, Russia
Citation
Zhivotnovodstvo Rossii, 2018, No.3, pp 53-54
Abstract

The aim of this work was to study the reproductive features and quality indicators of milk of black-and-white cows in the OJSC "Orlovskoye" of the Oryol region. The studies were conducted in 2016-2018 in OJSC "Orlovskoye of the Oryol region. The object of the research was the first heifers of the...

Author(s)
Lyashuk, A. R.; Andreychuk, O. A.
Publisher
Orel State Agrarian University, Orel, Russia
Citation
Bulletin of Agrarian Science, 2018, No.5, pp 98-103
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
Abstract

On commercial farms, rabbit does are subjected to a reproductive rhythm that does not account for their welfare or physiology, leading to reduced longevity and consequently high annual replacement. The European Food Safety Authority (EFSA) recommends limited and infrequent use of hormone...

Author(s)
Munari, C.; Ponzio, P.; Alkhawagah, A. R.; Schiavone, A.; Mugnai, C.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 125, pp 122-128
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 was to compare pregnancy per AI and follicular dynamic in suckled Bos taurus beef cows treated with either a 7-day progesterone+estradiol-based protocol or a 5-day progesterone CoSynch protocol for timed artificial insemination (TAI) during four breeding seasons. We hypothesized that...

Author(s)
Bilbao, M. G.; Zapata, L. O.; Harry, H. R.; Wallace, S. P.; Farcey, M. F.; Gelid, L.; Palomares, R. A.; Ferrer, M. S.; Bartolome, J. A.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 131, pp 72-78
AbstractFull Text

With the current expansion of sheep farming in Brazil and the need for genetic improvement of livestock, the most beneficial alternative available is artificial insemination (AI), and its adoption was facilitated by concomitant use of synchronization of estrus and ovulation in order to time ...

Author(s)
Soriano, G. A. M.; Ruediger, F. R. de; Castilho, C.
Publisher
Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, Brazil
Citation
Veterinária e Zootecnia, 2017, 24, Suppl. 1, pp 189-199
Abstract

This study evaluated the effect of breed and follicular status of Boer and indigenous goats on response to superovulation and embryo yield. The oestrous cycles were synchronized with progestagen for nine days and superovulated with porcine follicle-stimulating hormone. Does were cervically...

Author(s)
Mpebe, N. A.; Gonzalez-Bulnes, A.; Lehloenya, K. C.
Publisher
Taylor & Francis, Abingdon, UK
Citation
Journal of Applied Animal Research, 2018, 46, 1, pp 141-145

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