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Abstract

Fixed-time artificial insemination (FTAI) is the most effective method to increase the number of females inseminated in a single day, eliminating the necessity of estrus detection. Usually the treatments for FTAI in sheep are based on the use of progesterone-releasing devices and equine chorionic...

Author(s)
Menchaca, A.; Santos Neto, P. C. dos; Cuadro, F.
Publisher
Colégio Brasileiro de Reprodução Animal, Belo Horizonte, Brazil
Citation
Revista Brasileira de Reprodução Animal, 2017, 41, 1, pp 340-344
Abstract

The study of reproductive physiology in domestic ruminants has progressed from the whole animal to the molecular level in an amazingly short period of time. The volume of information on this subject is enormous; therefore, we have focused on domestic ruminants, with an emphasis on cattle. To date, ...

Author(s)
Smith, M. F.; Geisert, R. D.; Parrish, J. J.
Publisher
Oxford University Press, Cary, USA
Citation
Journal of Animal Science, 2018, 96, 7, pp 2952-2970
Abstract

Although essential for artificial insemination (AI) and MOET (multiple ovulation and embryo transfer), oestrus synchronisation and superovulation are associated with increased female reproductive tract mucus production and altered sperm transport. The effects of such breeding practices on the ovine ...

Author(s)
Maddison, J. W.; Rickard, J. P.; Bernecic, N. C.; Tsikis, G.; Soleilhavoup, C.; Labas, V.; Combes-Soia, L.; Harichaux, G.; Druart, X.; Leahy, T.; Graaf, S. P. de
Publisher
Elsevier Ltd, Oxford, UK
Citation
Journal of Proteomics, 2017, 155, pp 1-10
Abstract

This review considers the use of prostaglandin F and its synthetic analogues (PG) for controlling the estrous cycle of the ewe. Aspects such as phase of the estrus cycle, PG analogues, PG doses, ovarian follicle development pattern, CL formation, progesterone synthesis, ovulation rate, sperm...

Author(s)
Fierro, S.; Gil, J.; Viñoles, C.; Olivera-Muzante, J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2013, 79, 3, pp 399-408
Abstract

Reproduction of small ruminants can be controlled by several methods developed in recent decades. Some of these involve administration of hormones that modify the physiological chain of events involved in the sexual cycle. Methods which utilise progesterone or its analogues are based on their...

Author(s)
Abecia, J. A.; Forcada, F.; González-Bulnes, A.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Animal Reproduction Science, 2012, 130, 3/4, pp 173-179
Abstract

A novel method for oestrus-ovulation synchronization in sheep followed by fixed time insemination is presented herewith. Mature dry ewes (n=28) of Karagouniko breed being at an unknown stage of the oestrous cycle, were used during the middle of breeding season. The treatment protocol consisted of...

Author(s)
Deligiannis, C.; Valasi, I.; Rekkas, C. A.; Goulas, P.; Theodosiadou, E.; Lainas, T.; Amiridis, G. S.
Publisher
Blackwell Publishing, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2005, 40, 1, pp 6-10
AbstractFull Text

The ovarian response to a standard chronogest+eCG treatment with plasma levels of insulin, insulin-like growth factor-I (IGF-I), thyroids, non-esterified fatty acids (NEFA), βOH-butyrate (BHB) and urea-N (PUN) was studied in lactating Awassi ewes (n=105) during the late-summer - early autumn...

Author(s)
Marton, A.; Faigl, V.; Kerestes, M.; Kulcsar, M.; Nagy, S.; Febel, H.; Danko, G. N.; Magyar, K.; Husveth, F.; Solti, L.; Cseh, S.; Huszenicza, G.
Publisher
Czech Academy of Agricultural Sciences, Prague, Czech Republic
Citation
Veterinární Medicína, 2009, 54, 11, pp 507-516
Abstract

8 Poll Dorset ewes were kept under the natural photoperiod of southern England from 21 Sep. of one year to 17 Oct. in the following year, and 8 similar ewes were kept under a simulated equatorial photoperiod of 13-h light:11-h darkness for the same period. Neither group showed complete seasonal...

Author(s)
Pijoan, P. J.; Williams, H. L.
Publisher
University of Illinois, Urbana, USA
Citation
10th International Congress on Animal Reproduction and Artificial Insemination, June 10-14 1984, University of Illinois at Urbana-Champaign, Illinois, USA. Volume II. Brief communications., 1984, Paper No. 30, pp 3 pp.
Abstract

Progesterone levels in jugular plasma samples indicated that exogenous progesterone treatments were not interfering with the development of corpora lutea, but were inducing premature luteal regression. It was observed that short cycles occurred only in ewes treated before day 4 of the oestrous...

Author(s)
Bray, A. R.; Wodzicka-Tomaszewska, M.; Hecker, J. F.
Citation
VIIIth International Congress on Animal Reproduction and Artificial Insemination, Krakow, July 12-16, 1976. Proceedings. Volume I. Communication Abstracts., 1976, pp 43
Abstract

The concentration of progesterone in the plasma of 15 Finnish Landrace, 17 Fingalway (Finnish Landrace X Galway) and 18 Galway ewes was measured throughout the oestrous cycle. Blood samples were taken daily between 09.00 and 11.00 h. The ovaries were examined by laparoscopy, and the number of...

Author(s)
Quirke, J. F.; Gosling, J.
Citation
VIIIth International Congress on Animal Reproduction and Artificial Insemination, Krakow, July 12-16, 1976. Proceedings. Volume I. Communication Abstracts., 1976, pp 207

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