Chief EditorK.M.L. Pathak
Print ISSN 0367-6722
Online ISSN 0976-0555
NAAS Rating 6.43
Impact Factor 0.5 (2023)
The Efficacy of Three Different Estrus Synchronization Protocols on Reproductive Performance in Chinese Hu Sheep
First Online 12-03-2022|
Methods: This study was conducted on 80 multiparous ewes, which were assigned into four groups: CIDR9+PGF2α+eCG; CIDR14+eCG; GnRH+PGF2α and control. Behavioral estrus was checked with teaser rams. Percentage of ewes behaving estrus at different time (0-24 h, 24-48 h, 48-72 h, respectively) was recorded. Pregnancy diagnosis was implemented on day 28 and confirmed on day 60 after insemination.
Result: The results suggested that the estrus rate, pregnancy rate, conception rate, lambing rate and prolificacy in three treatment groups have no significant difference compared with control group. Most notably, CIDR9+PGF2α+eCG and CIDR14+eCG have significantly shorter duration of pregnancy than control. While CIDR14+eCG and GnRH+PGF2α did not dramatically change the fecundity of ewes, still CIDR9+PGF2α+eCG significantly decreased the fecundity of that compared with the control. Estrus responses in CIDR9+PGF2α+eCG, CIDR14+eCG and GnRH+PGF2α groups rose gradually to attain their significantly higher percentages (56.3%, 52.9% and 66.7%, respectively) during 24-48 h post-estrous detection, afterwards, they fell down.
- Abecia, J.A., Forcada, F. and González-Bulnes, A. (2012). Hormonal control of reproduction in small ruminants. Animal Reproduction Science. 130(3-4): 173-179.
- Alavez-Ramírez, A., Montes-Pérez, R., Aguilar-Caballero, A.J. and Ortega-Pacheco, A. (2016). Effect of the combination of male effect with PGF2α on estrus synchronization of hair sheep in Mexican tropic. Tropical Animal Health and Production. 48(3): 655-658.
- Alminer, M., Tabbaa, M.J., Amasheh, M. and Alzyoud, H. (2005). Hormonal treatments and the ram effect on synchronized oestrus in Awassi ewes at the beginning of the breeding season. New Zealand Journal of Agricultural Research. 48: 473-480.
- Ataman, M.B. and Aköz, Mehmet. (2006). GnRH-PGF2± and PGF2±PGF2± synchronization in Akkaraman cross-bred sheep in the breeding season. Bulletin of the Veterinary Institute in Pulawy. 50(1): 101-104.
- Ataman, M.B., Akoz, M., Saribay, M.K., Erdem, H. and Bucak, M.N. (2013). Prevention of embryonic death using different hormonal treatments in ewes. Turkish Journal of Veterinary and Animal Sciences. 37(1): 6-8.
- Beck, N.F.G., Davies, B. and Williams, S.P. (1993). Oestrous synchronization in ewes: the effect of combining a prostaglandin analogue with a 5-day progestagen treatment. Animal Production. 56(2): 207-210.
- Boscos, C.M., Samartzi, F.C., Dellis, S., Rogge, A., Stefanakis, A. and Krambovitis, E. (2002). Use of progestagen-gonadotrophin treatments in estrus synchronization of sheep. Theriogenology. 58(7): 1261-1272.
- De, K., Kumar, D., Sethi, D., Gulyani, R. and Naqvi, S.M.K. (2015). Estrus synchronization and fixed-time artificial insemination in sheep under field conditions of a semi- arid tropical region. Tropical Animal Health and Production. 47(2): 469-472.
- Evans, G. (1988). Current topics in artificial insemination of sheep. Australian Journal of Biological Sciences. 41(1): 103-116.
- Fierro, S., Gil, J., Viñoles, C. and Olivera-Muzante, J. (2013). The use of prostaglandins in controlling estrous cycle of the ewe: A review. Theriogenology. 79(3): 399-408.
- Fitzgerald, J.A., Ruggles, A.J., Stellflug, J.N. and Hansel, W. (1985). A seven-day synchronization method for ewes using medroxyprogesterone acetate (MAP) and prostaglandin F2±. Journal of Animal Science. 61(2): 466-469.
- Gonzalez-Bulnes, A., Souza, C.J., Campbell, B.K. and Baird, D.T. (2004). Systemic and intraovarian effects of dominant follicles on ovine follicular growth. Animal Reproduction Science. 84(1-2): 107-119.
- Greyling, J.P.C., Van der Westhuysen, J.M. and Van Niekerk, C.H. (1979). The synchronisation of oestrus in sheep. 1. Dosage and time of prostaglandin administration following progestagen pretreatment. South African Journal of Animal Science. 9(3): 185-192.
- Hashem, N.M., El-Zarkouny, S.Z., Taha, T.A. and Abo-Elezz, Z.R. (2015). Oestrous response and characterization of the ovulatory wave following oestrous synchronization using PGF2± alone or combined with GnRH in ewes. Small Ruminant Research. 129: 84-87.
- Husein, M.Q. and Kridli, R.T. (2003). Effect of progesterone prior to GnRH-PGF2α treatment on induction of oestrus and pregnancy in anoestrous Awassi ewes. Reproduction in Domestic Animals. 38(3): 228-232.
- Inya, T. and Sumretprasong, J. (2013). Serum progesterone profiles in saanen crossbred goats during a 5 day progestin-based estrous synchronization protocol. Kasetsart Journal Natural Science. 47(1): 94-100.
- Kulaksiz, R., Ucar, Ö. and Dasin, A. (2013). Effects of FGA sponge and ovsynch based protocols on reproductive performance of fat-tailed ewes during the breeding season. Kafkas Universities Veteriner Fakultesi Dergisi. 19: 629-33.
- Leboeuf, B., Restall, B. and Salamon, S. (2000). Production and storage of goat semen for artificial insemination. Animal Reproduction Science. 62(1-3): 113-141.
- Martinez-Ros, P., Rios-Abellan, A. and Gonzalez-Bulnes, A. (2018). Influence of progesterone-treatment length and eCG administration on appearance of estrus behavior, ovulatory success and fertility in sheep. Animals. 9(1): 9.
- Menchaca, A. and Rubianes, E. (2004). New treatments associated with timed artificial insemination in small ruminants. Reproduction, Fertility and Development. 16(4): 403-413.
- Menchaca, A., dos Santos-Neto P.C., Cuadro, F, Souza-Neves, M. and Crispo, M. (2018). From reproductive technologies to genome editing in small ruminants: An embryo’s journey. Animal Reproduction. 15: 984-995.
- Motlomelo, K.C., Greyling, J.P.C. and Schwalbach, L.M.J., 2002. Synchronisation of oestrus in goats: the use of different progestagen treatments. Small Ruminant Research. 45(1): 45-49.
- Nogueira, D.M., Lopes Júnior, E.S., Peixoto, R.M.D., Christilis, M., Martins, S.R. and Monte, A.P.O.do. (2011). Using the same CIDR up to three times for estrus synchronization and artificial insemination in dairy goats. Acta Scientiarum. Animal Sciences. 33(3): 321-325.
- Oliveira, M.A.L., Guido, S.I. and Lima, P.F. (2001). Comparison of different protocols used to induce and synchronize estrus cycle of Saanen goats. Small Ruminant Research. 40(2): 149-153.
- Romano, J.E. (2004). Synchronization of estrus using CIDR, FGA or MAP intravaginal pessaries during the breeding season in Nubian goats. Small Ruminant Research. 55(1-3): 15-19.
- Russel, A.J.F., Doney, J.M. and Gunn, R.G. (1969). Subjective assessment of body fat in live sheep. The Journal of Agricultural Science. 72(03): 451-454.
- Swelum, A.A., Alowaimer, A.N. and Abouheif, M.A. (2015). Use of fluorogestone acetate sponges or controlled internal drug release for estrus synchronization in ewes: Effects of hormonal profiles and reproductive performance. Theriogenology. 84: 498-503.
- Titi, H.H., Kridli, R.T. and Alnimer, M.A., (2010). Estrus synchronization in sheep and goats using combinations of GnRH, progestagen and prostaglandin F2±. Reproduction in Domestic Animals. 45(4): 594-599.
- Yue, G.H. (1996). Reproductive characteristics of Chinese Hu sheep. Animal Reproduction Science. 44(4): 223-230.
- Zeleke, M., Greyling, J.P.C., Schwalbach, L.M.J., Muller, T. and Erasmus, J.A. (2005). Effect of progestagen and pmsg on oestrous synchronization and fertility in dorper ewes during the transition period. Small Ruminant Research. 56(1-3): 47-53.
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.