Peer-reviewed articles 17,970 +


Title: OPTIMIZING A PROTOCOL FOR INDUCING AND SYNCHRONIZING ESTRUS IN SHEEP DURING NON-BREEDING SEASON
OPTIMIZING A PROTOCOL FOR INDUCING AND SYNCHRONIZING ESTRUS IN SHEEP DURING NON-BREEDING SEASON

PlumX Article Metrics by Elsevier
Ion Valeriu Caraba; Marioara Nicoleta Caraba; Gabi Dumitrescu; Elena Pet; Roxana Popescu
10.5593/sgem2023V/6.2/s25.37
10.5593/sgem2023v/6.2
1314-2704
978-619-7603-66-8
English
23
6.2
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Advances in Biotechnology
Induction and synchronization of estrus during non-breeding season is the most frequently used biotechnological method of assisted reproduction in sheep. Synchronization of estrus in sheep is a very important breeding technique as it can effectively improve the reproductive performance of sheep, minimize the effects of seasonal factors on sheep reproduction, extend the breeding season of sheep, shorten the estrus interval, increase the gestation rate, increase the birth rate, it can also lead to the shortening of the time between generations. The study proposes a method of inducing and synchronizing estrus during non-breeding season in Turcan sheep, which uses vaginal sponges with FGA (20 mg), supplemented by the administration of PGF2? (0.20 mg) and GnRH (7 µg). The analyzed parameters were: sponge loss rate, vaginitis onset rate, total percentage of ewes in estrus and gestation rate. The results obtained for the induction rate and synchronization of estrus during non-breeding, the reproductive period in sheep from the Turcana breed of 88.88%, respectively for the rate of pregnancy deception of 81.25% indicate that the method used was an efficient one.
[1] Hameed N., Khan M.I-R, Zubair M., Andrabi S.M.H., Approaches of estroussynchronization in sheep: developments during the last two decades: a review, Tropical Animal Health and Production, vol. 53, pp 485, 2021. https://doi.org/10.1007/s11250-021-02932-8.
[2] Martinez-Ros P., Lozano M., Hernandez F., Tirado A., Rios-Abellan A., LopezMendoza M.C., et al. Intravaginal device-type and treatment-length for ovine estrussynchronization modify vaginal mucus and microbiota and affect fertility, Animals, vol.8, pp 226, 2018. doi: 10.3390/ani8120226.
[3] Dias J., Miranda V., Oliveira F., Junior S.V., Haas C., Costa V., Lucia Jr T., VieiraA., Corcini C., Gasperin B., Treatment with eCG and hCG to induce onset of estrouscycles in ewes during the non-breeding season: Efects on follicular development andfertility, Animal Reproduction Science, vol. 212, pp 106232, 2020.
[4] Fleisch A., Bollwein H., Piechotta M., Janett F., 2015. Reproductive performance ofLacaune dairy sheep exposed to artif cial long days followed by natural photoperiodwithout and with additional progestagen treatment during the nonbreeding season,Theriogenology, vol. 83, pp 320-325, 2015.
[5] Nakafeero A., Hassen A., Lehloenya K., Investigation of ram efect and eCG usagein progesterone based oestrous synchronization protocols on fertility of ewes followingfxed time artifcial insemination, Small Ruminant Research, vol 183, pp 106034, 2020.
[6] Ungerfeld R., Clemente N., Bonjour L., Orihuela A., Equine chorionicgonadotrophin administration to rams improves their efectiveness to stimulateanoestrous ewes (the “ram efect”), Animal Reproduction Science, vol 149, pp 194-198,2014.
[7] Olivera-Muzante J., Fierro S., Lopez V., Gil J., Compari son of prostaglandin-andprogesterone-based protocols for timed artifcial insemination in sheep, Theriogenology,vol 75, pp 1232-1238, 2011.
[8] Karaca F., Ataman M., Coyan K., Synchronization of estrus with short-and longterm progestagen treatments and the use of GnRH prior to short-term progestagentreatment in ewes, Small Ruminant Research, vol 81, pp 185-188, 2009.
[9] Braganca J.F., Maciel J.M., Girardini L.K., Machado S.A., da Rocha J.F., ToninA.A., da Rocha R.X., Infuence of a device intravaginal to synchronization/induction ofestrus and its reuse in sheep vaginal flora, Comparative Clinical Pathology, vol 26, pp1369-1373, 2017.
[10] Texeira T.A., Da Fonseca J.F., de Souza-Fabjan J.M.G., de Rezende CarvalheiraL., de Moura Fernandes D.A., Brandao F.Z., Efciency of diferent hormonal treatmentsfor estrus synchronization in tropical Santa Ines sheep, Tropical animal health andproduction, vol 48, pp 545-551, 2016.
[11] Martinez-Ros P., Rios-Abellan A., Gonzalez-Bulnes A., Infuence of progesteronetreatment length and eCG administration on appearance of estrous behavior, ovulatorysuccess and fertility in sheep, Animals, vol 9, pp 9, 2019.
[12] Swartz J.D., Lachman M., Westveer K., O’Neill T., Geary T., Kott R.W.,Berardinelli J.G., Hatfeld P.G., Thomson J.M., Roberts A., Characterization of thevaginal microbiota of ewes and cows reveals a unique microbiota with low levels oflactobacilli and near-neutral pH, Frontiers in Veterinary Science, vol 1, pp 19, 2014.
[13] Altincekic S.O., Koyuncu M., The efects of short-mid-long term intravaginalsponge application on reproductive performance of Karacabey Merino ewes in theanestrous season, Indian Journal of Animal Research, vol 53, pp 33-36, 2019.

[14] Contreras-Solis I., Vasquez B., Diaz T., Letelier C., Lopez-Sebastian A., GonzalezBulnes A., Efciency of estrous synchronization in tropical sheep by combining shortinterval cloprostenol-based protocols and “male efect”, Theriogenology, vol 71, pp1018-1025, 2009.
[15] Souza-Fabjan J.M.G., Balaro M.F.A., Braganca G.M., Pinto P.H.N., de AlmeidaJ.G., Moura A.B.B., da Fonseca J.F., and Brandao F.Z., Use of two doses ofcloprostenol in diferent intervals for estrus synchronization in hair sheep under tropicalconditions, Tropical animal health and production, vol 50, pp 427-432, 2018.
[16] Fierro S., Gil J., Vinoles C., Olivera-Muzante J., The use of prostaglandins incontrolling estrous cycle of the ewe: A review, Theriogenology, vol 79, pp 399-408,2013.
[17] Ramirez A.A., Villalvazo V.M.M., Arredondo E.S., Ramirez H.A.R., Sevilla H.M.,D-Cloprostenol enhances estrus synchronization in tropical hair sheep. Tropical AnimalHealth and Production, vol 50, pp 991-996, 2018.
conference
https://doi.org/10.5593/sgem2023V/6.2/s25.37
Download PDF
Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 28-30 November, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
303-310
28-30 November, 2023
website
9612
sheep, estrus, non-breeding season