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Abstract

Donkey farming is expanding because of the rediscovery of nutritional properties of jennies' milk for human consumption. In livestock, timed artificial insemination (TAI) allows to manage big herds without estrus detection, but there are very few studies on estrus synchronization in jennies. The...

Author(s)
Fanelli, D.; Tesi, M.; Rota, A.; Beltramo, M.; Camillo, F.; Panzani, D.
Publisher
Elsevier, New York, USA
Citation
Journal of Equine Veterinary Science, 2019, 74, pp 36-41
Abstract

The objective of this study was to determine the relative importance and contribution of several physiological factors as predictors of pregnancy risk in an Ovsynch (GnRH-1-7 d-PGF-56 h-GnRH-2-16 h-artificial insemination) timed artificial insemination program: (1) age of the corpus luteum (CL;...

Author(s)
Stevenson, J. S.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 12, pp 10077-10092
Abstract

The establishment of pregnancy following insemination is the primary definition of fertility in most dairy systems. Highly fertile cows establish pregnancy sooner after calving and require fewer inseminations than lower-fertility cows. Pregnancy occurs through a series of individual events in...

Author(s)
Lucy, M. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 4, pp 3706-3721
AbstractFull Text

The objective of this study was to evaluate the effect of a second prostaglandin F (PGF) treatment during Ovsynch on luteal regression and fertility in dairy cows, compared with standard Ovsynch. The study was conducted on 111 Holstein Friesian multiparous cows on commercial dairy farm. The...

Author(s)
Nowicki, A.; Barański, W.; Tobolski, D.; Zduńczyk, S.; Janowski, T.
Publisher
Polish Academy of Sciences, Committee of Veterinary Sciences, Olsztyn-Kortowo II, Poland
Citation
Polish Journal of Veterinary Sciences, 2019, 22, 1, pp 157-161
Abstract

The aim of the experiment was to evaluate the reproductive performance of ewes synchronized with two doses of prostaglandin F (PG) at different intervals and inseminated at a fixed time. During the breeding season (April to June), 370 multiparous Corriedale ewes were assigned to five groups...

Author(s)
Fierro, S.; Viñoles, C.; Olivera-Muzante, J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 90, pp 109-113
Abstract

Contents The objective of this study was to determine whether fluid drainage from the subordinate follicles by ovum pickup procedures prevents the risk of twin pregnancy without reducing the fertility of the cow. Lactating dairy cows with at least two follicles over 12 mm diameter located one on...

Author(s)
López-Gatius, F.; Hunter, R. H. F.
Publisher
Wiley, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2018, 53, 1, pp 213-216
Abstract

Two experiments were conducted with the aim of determining the effect of equine chorionic gonadotropin (eCG) administration on day 14 after insemination on ovarian response and pregnancy establishment in postpartum anestrous beef cows. In both experiments, cows were subjected to a progesterone- and ...

Author(s)
Núñez-Olivera, R.; Castro, T. de; Bó, G. A.; Piaggio, J.; Menchaca, A.
Publisher
Elsevier Inc, New York, USA
Citation
Domestic Animal Endocrinology, 2018, 62, pp 24-31
AbstractFull Text

Fixed-time artificial insemination (IATF, in Spanish) in beef cattle has provided the use of genetically superior bulls in order to maximize the quality of calves. However, implementing this reproductive technique has proved to be difficult to apply in heifers nursing calves for several months of...

Author(s)
Yánez-Avalos, D. O.; López-Parra, J. C.; Moyano-Tapia, J. C.; Quinteros-Pozo, R. O.; Marini, P. R.
Publisher
Universidad de Costa Rica, Alajuela, Costa Rica
Citation
Agronomía Mesoamericana, 2018, 29, 2, pp 363-373
Abstract

Objective: To investigate the effect of concentration of progesterone (P4) before artificial insemination (AI) on fertility in ovulatory or anovulatory Bos indicus cattle. Design: Randomised control study. Methods: The study included 162 heifers and 96 lactating cows. On days -10 to -12, animals...

Author(s)
Cavalieri, J.; Gaina, C.; Hepworth, G.
Publisher
Wiley, Melbourne, Australia
Citation
Australian Veterinary Journal, 2018, 96, 9, pp 346-355
AbstractFull Text

There is no information available about the incidence of anestrus and its clinical forms after service in dairy cows in Poland. Thus, the aim of this study was to investigate the incidence of clinical forms of anoestrus after unsuccessful artificial insemination in dairy cows based on ultrasound...

Author(s)
Barański, W.; Nowicki, A.; Zduńczyk, S.; Janowski, T.
Publisher
Polish Academy of Sciences, Committee of Veterinary Sciences, Olsztyn-Kortowo II, Poland
Citation
Polish Journal of Veterinary Sciences, 2018, 21, 2, pp 377-381

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