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Abstract

Estrus synchronization and artificial insemination are commonly used as a pair of matching technologies in sheep breeding. In view of the uneven estrus synchronization rate and conception rate in practical production, the estrus synchronization method of "CIDR+PMSG+PG" is introduced and the...

Author(s)
Zhang ZhiHong
Publisher
Inner Mongolia Academy of Agriculture and Animal Husbandry Science, Hohhot, China
Citation
Animal Husbandry and Feed Science (Inner Mongolia), 2018, 39, 1, pp 76-78
Abstract

Brazil has a large flock of sheep, with about 18.41 million heads. Genetic improvement is a way to increase farm productivity, with fixed-time artificial insemination (TAI) being used for this purpose. Therefore, the objective of this study was to evaluate the interval between estrus manifestation...

Author(s)
Farias, L. B.; Maffi, A. S.; Luz, G. B.; Brauner, C. C.
Publisher
Veterinaria Organizacion S.L., Malaga, Spain
Citation
REDVET, 2018, 19, 7, pp 071806
Abstract

The aim of this study was to evaluate the reproductive impact of a short-term protein supplementation on a long interval prostaglandin-based protocol (two PG injections 15 d apart; PG15) for timed artificial insemination in sheep. During the breeding season, 437 multiparous Merino ewes grazing...

Author(s)
Errandonea, N.; Fierro, S.; Viñoles, C.; Gil, J.; Banchero, G.; Olivera-Muzante, J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 114, pp 34-39
Abstract

The purpose of this study was to evaluate the possibility of using laparoscopic insemination in working conditions in sheep farms. We evaluated the success of laparoscopic insemination. A total of 83 sheep of breed SF, ML, V, S and R in three different farms was treated from 2011-2013 years. The...

Author(s)
Hegedüšová, Z.; Vejnar, J.; Dufek, A.; Čunát, L.
Publisher
Profi Press, s.r.o., Praha 2, Czech Republic
Citation
Veterinářství, 2014, 64, 12, pp 942-945
AbstractFull Text

BACKGROUND: Use of different estrus synchronization protocols and artificial insemination methods made variations in fecundity of Iranian Zell ewes. OBJECTIVES: The purpose of the present study was to investigate pregnancy and lambing rates in Zell breed ewes following diverse progesterone...

Author(s)
Masoudi, R.; Towhidi, A.; Kermani Moakhar, H.; Zeinoaldini, S.; Hasanpour Bashi, S.
Publisher
Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
Citation
Journal of Veterinary Research, 2014, 69, 2, pp 133-139
Abstract

The aim of this study was to evaluate the effect of estradiol (E2), oxytocin (OT), relaxin (relaximol) injection and prostaglandin E1 (misoprostol) suppository on the cervix dilation, time of cervical dilation persistency and pregnancy rate of Zandi ewes using artificial insemination. Eighty 3-4...

Author(s)
Masoudi, R.; Zare-Shahneh, A.; Tohidi, A.; Kahram, H.; Sharif, A. A.; Sharafi, M.; Zahedi, V.
Publisher
University of Tehran, Tehran, Iran
Citation
Iranian Journal of Animal Science (IJAS), 2014, 45, 2, pp Pe125-Pe133
Abstract

Different therapeutic strategies have been used with the objective of improve luteal function to reduce embryonic losses. The objective of this work was to study the effect of the administration of GnRH or hCG at Day 4 post fixed time artificial insemination (FTAI) on reproductive efficiency in...

Author(s)
Fernandez, J.; Bruno-Galarraga, M. M.; Soto, A. T.; Sota, R. L. de la; Cueto, M. I.; Lacau-Mengido, I. M.; Gibbons, A. E.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 126, pp 63-67
Abstract

Hu sheep and small-tail Han sheep used as female parents were crossbred with Dorper sheep. The flocks of female Hu sheep and small-tail Han sheep were induced to estrus synchronization by exogenous hormones, and hybridized by artificial insemination of fresh semen from Dorper sheep. The daily gain, ...

Author(s)
Wang JiaLi; Hu HongWei; Zhang ChengHu
Publisher
Lanzhou Institute of Animal Husbandry and Veterinary, CAAS, Lanzhou, China
Citation
China Herbivore Science, 2017, 37, 4, pp 9-11
Abstract

A study was conducted to assess the success of estrus synchronization and fixed-time artificial insemination (FTAI) in sheep under field conditions of a semi-arid tropical region. A total of 471 ewes belonging to 17 farmers of four villages in Tonk district of Rajasthan (Jelmiya, Dhani...

Author(s)
Kalyan De; Davendra Kumar; Debabrata Sethi; Rajiv Gulyani; Naqvi, S. M. K.
Publisher
Springer, Amsterdam, Netherlands
Citation
Tropical Animal Health and Production, 2015, 47, 2, pp 469-472
Abstract

Although fixed-time artificial insemination (FTAI) protocols are available for sheep, estrus resynchronization has not been previously reported. The objectives of this study were to evaluate the effect of estrus resynchronization with exogenous progestogen on endogenous progesterone levels and to...

Author(s)
Miranda, V. O.; Oliveira, F. C.; Dias, J. H.; Vargas Júnior, S. F.; Goularte, K. L.; SáFilho, M. F.; SáFilho, O. G. de; Baldassarre, H.; Vieira, A. D.; Lucia, T.; Gasperin, B. G.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 106, pp 103-107

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