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Veterinary Medicine International
Volume 2010 (2010), Article ID 978520, 4 pages
Research Article

Fertility Rates of Ewes Treated with Medroxyprogesterone and Injected with Equine Chorionic Gonadotropin plus Human Chorionic Gonadotropin in Anoestrous Season

1Animal Reproduction, Faculty of Veterinary Medicine, Federal University of Paraná State, Palotina, Brazil
2Departamento de Medicina Veterinária, Laboratório de Reprodução Animal, Faculdade de Medicina Veterinária, Universidade Federal do Paraná, Campus de Palotina, Rua Pioneiro, 2153, 85950-000 Palotina, Brazil
3Animal Reproduction, Faculty of Veterinary Medicine, Federal University of Paraná State, Curitiba, Brazil

Received 30 March 2010; Revised 11 July 2010; Accepted 3 September 2010

Academic Editor: Philip H. Kass

Copyright © 2010 I. W. Santos et al. 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.

Linked References

  1. J. P. Neves, J. F. J. Nunes, C. F. Moraes, C. J. H. Souza, C. C. M Salgueiro, and J. L. Almeida, “Inseminação artificial em pequenos ruminantes,” in Biotécnicas aplicadas à reprodução animal, P. B. D. Gonçalves, J. R. Figueredo, and V. J. F. Freitas, Eds., Roca, São Paulo, Brazil, 2nd edition, 2008. View at Google Scholar
  2. W. L. Hunt, D. Addleman, and R. Bogart, “Induction of multiovulation in the ewe following synchronization of estrus,” Journal of Animal Science, vol. 32, no. 3, pp. 491–495, 1971. View at Google Scholar
  3. I. Gordon, “The use of progestagens in sheep bred by natural and artificial insemination,” Annales de Biologie Animale, Biochimie, Biophysique, vol. 15, no. 2, pp. 303–315, 1975. View at Google Scholar
  4. I. Gordon, Controlled Reproduction in Sheep & Goats, CABI, New York, NY, USA, 1999.
  5. M. Zarkawi, “Oestrous synchronisation and twinning rate of Syrian Awassi ewes treated with progestagen and PMSG during the breeding season,” New Zealand Journal of Agricultural Research, vol. 44, no. 2-3, pp. 159–163, 2001. View at Google Scholar
  6. A. W. H. Braden and G. R. Moule, “Induction of ovulation in anoestrus ewes,” Australian Journal of Experimental Agriculture, vol. 2, pp. 75–77, 1962. View at Google Scholar
  7. M. A. Cline, J. N. Ralston, R. C. Seals, and G. S. Lewis, “Intervals from norgestomet withdrawal and injection of equine chorionic gonadotropin or P.G. 600 to estrus and ovulation in ewes,” Journal of Animal Science, vol. 79, no. 3, pp. 589–594, 2001. View at Google Scholar · View at Scopus
  8. A. Menchaca and E. Rubianes, “New treatments associated with timed artificial insemination in small ruminants,” Reproduction, Fertility and Development, vol. 16, no. 4, pp. 403–413, 2004. View at Publisher · View at Google Scholar · View at Scopus
  9. I. Dogan and Z. Nur, “Different estrous induction methods during the non-breeding season in Kivircik ewes,” Veterinarni Medicina, vol. 51, no. 4, pp. 133–138, 2006. View at Google Scholar · View at Scopus
  10. M. Q. Husein and M. M. Ababneh, “A new strategy for superior reproductive performance of ewes bred out-of-season utilizing progestagen supplement prior to withdrawal of intravaginal pessaries,” Theriogenology, vol. 69, no. 3, pp. 376–383, 2008. View at Publisher · View at Google Scholar · View at Scopus
  11. L. Todini, A. Malfatti, O. Barbato, S. Costarelli, and A. Debenedetti, “Progesterone plus PMSG priming in seasonally anovulatory lactating Sarda ewes exposed to the ram effect,” Journal of Reproduction and Development, vol. 53, no. 2, pp. 437–441, 2007. View at Publisher · View at Google Scholar · View at Scopus
  12. M. Q. Husein, M. M. Ababneh, and D. S. Abu-Ruman, “The effects of short or long term FGA treatment with or without eCG on reproductive performance of ewes bred out-of-season,” American Journal of Animal and Veterinary Sciences, vol. 2, no. 1, pp. 23–28, 2007. View at Google Scholar
  13. M. M. Moeini, A. A. Moghaddam, A. Bahirale, and H. Hajarian, “Effects of breed and progestin source on estrus synchronization and rates of fertility and fecundity in Iranian Sanjabi and Lori Ewes,” Pakistan Journal of Biological Sciences, vol. 10, no. 21, pp. 3801–3807, 2007. View at Google Scholar · View at Scopus
  14. D. M. W. Barrett, P. M. Bartlewski, M. Batista-Arteaga, A. Symington, and N. C. Rawlings, “Ultrasound and endocrine evaluation of the ovarian response to a single dose of 500 IU of eCG following a 12-day treatment with progestogen-releasing intravaginal sponges in the breeding and nonbreeding seasons in ewes,” Theriogenology, vol. 61, no. 2-3, pp. 311–327, 2004. View at Publisher · View at Google Scholar · View at Scopus
  15. L. Simonetti, F. Forcada, O. E. Rivera et al., “Simplified superovulatory treatments in Corriedale ewes,” Animal Reproduction Science, vol. 104, no. 2–4, pp. 227–237, 2008. View at Publisher · View at Google Scholar · View at Scopus
  16. B. Hafez and E. S. E. Hafez, Reprodução Animal, Manole, São Paulo, Brazil, 7th edition, 2004.
  17. Brazilian College of Animal Reproduction, Manual for andrologic examination and animal semen evaluation, CBRA, Belo Horizonte, Brazil, 2nd edition, 1998.
  18. G. Evans and W.M.C. Maxwell, Salamon’s Artificial Insemination of Sheep and Goats, Butterworths, Sydney, Australia, 1987.
  19. B. Kühholzer, F. Schmoll, U. Besenfelder et al., “Ultrasonographic examination of ovarian structure dynamics in superovulated ewes,” Reproduction in Domestic Animals, vol. 33, no. 5, pp. 343–346, 1998. View at Google Scholar · View at Scopus
  20. P. Slósarz, A. Frankowska, and M. Mis, “Transrectal ultrasonography in diagnosing the ovulation rate in sheep,” Animal Science Paper and Reports, vol. 21, pp. 183–189, 2003. View at Google Scholar