Vet Med - Czech, 2006, 51(4):133-138 | DOI: 10.17221/5532-VETMED

Different estrous induction methods during the non-breeding season in Kivircik ewes

I. Dogan, Z. Nur
Department of Reproduction and Artificial Insemination, Veterinary Faculty, Uludag University, Gorukle/Bursa, Turkey

The efficiency of medroxyprogesterone acetate (MAP) sponges in combination with either pregnant mare serum gonadotrophin (PMSG) or cloprostenol (PGF2α) for inducing and synchronizing the estrous cycle in non-lactating Kivircik ewes was investigated during the natural non-breeding season. All ewes (n = 69) were treated with 60 mg MAP sponges for 12 days. In addition, each ewe received an intramuscular injection of either 1.5 ml sterile saline solution (n = 18); 125 μg PGF2α (n = 14); 500 IU PMSG (n = 18) or 500 IU PMSG and 125 μg PGF2α (n = 19), 48 h before the sponge removal. Cervical artificial insemination (AI) with diluted fresh semen was performed at a fixed time (48 and 60 h) following progestagen withdrawal. The different groups estrous response for the first 24 ± 6 h and within 120 h, time to onset and duration of the induced estrous, and pregnancy rate was found to be 36.2%, 81.6%, 41.7 ± 2.3 h, 29.6 ± 1.5 h, and 54.5%, respectively. There were significant differences between groups MAP and MAP/PGF2α and their with the two latter groups (MAP/PMSG, MAP/PMSG/PGF2α) in terms of the onset of induced estrous (P < 0.05) and between groups MAP and MAP/PGF2α in terms of the duration of induced estrous (P < 0.05) and between the first two groups (MAP, MAP/PGF2α) and the latter two groups (MAP/PMSG, MAP/PMSG/PGF2α) in terms of estrous response at the first 24 ± 6 h (P < 0.05). These results indicate that, the use of MAP/PMSG, rather than MAP or MAP/PGF2α, was effective in the attainment of early and compact induction and synchronization of estrous in non-lactating Kivircik ewes during the natural non-breeding season.

Keywords: ewes; anestrous; cloprostenol; PMSG; MAP

Published: April 30, 2006  Show citation

ACS AIP APA ASA Harvard Chicago Chicago Notes IEEE ISO690 MLA NLM Turabian Vancouver
Dogan I, Nur Z. Different estrous induction methods during the non-breeding season in Kivircik ewes. Vet Med - Czech. 2006;51(4):133-138. doi: 10.17221/5532-VETMED.
Share...
Download citation
  • BibTeX (.bib)
  • Bookends (.ris)
  • EasyBib (.ris)
  • EndNote (.enw)
  • EndNote 8 (.xml)
  • ISI WoS (.isi)
  • Medlars (.medlars)
  • Mendeley (.ris)
  • MODS (.xml)
  • Papers (.ris)
  • RefWorks (.txt)
  • RefManager (.ris)
  • RIS (.ris)
  • MS Word (.xml)
  • Zotero (.ris)
    • Open full article

    References

    1. Ahmed M.M.M., Makawi S.E., Jubara A.S. (1998): Synchronization of oestrus in Nubian goats. Small Ruminant Research, 30, 113-120. Go to original source...
    2. Akusu M.O., Egbunike G.N. (1984): Fertility of the WestAfrican dwarf goat in its native environment following prostaglandin F2-alpha induced estrus. Veterinary Quarterly, 6, 173-176. Go to original source... Go to PubMed...
    3. Allison A.J., Robinson T.J. (1970): The effect of does level of intravaginal progestagen on sperm transport, fertilization and lambing in the cyclic Merino ewe. Journal of Reproduction and Fertility, 22, 515-531. Go to original source... Go to PubMed...
    4. Baril G., Leboeuf B., Saumande J. (1993): Synchronization of estrus in goats: the relationship between time of occurrence of estrus and fertility following artificial insemination. Theriogenology, 40, 621-628. Go to original source... Go to PubMed...
    5. Cline M.A., Ralston J.N., Seals R.C., Lewis G.S. (2001): Intervals from norgestomet withdrawal and injection of equine chorionic gonadotropin or P.G. 600 to estrus and ovulation in ewes. Journal of Animal Science, 79, 589-594. Go to original source... Go to PubMed...
    6. Das G.K., Naqvi S.M.K., Gulyani R., Pareek S.R., Mittal, J.P. (2000): Effect of two doses of progesterone on estrus response and fertility in acycling crossbred Bharat Merino ewes in a semi-arid tropical environment. Small Ruminant Research, 37, 159-163. Go to original source... Go to PubMed...
    7. Fuentes V.O., Gonzalez H., Sanchez V., Garcia A., Fuentes P. (1998): The effect of naloxone on the duration of oestrus ovulation rate and oestradiol 17 β in crossbred ewes with induced oestrus during seasonal anoestrus. Small Ruminant Research, 29, 89-92. Go to original source...
    8. Gordon I. (1999): Controlled Reproduction in Sheep & Goats. CABI Publishing, New York.
    9. Greyling J.P.C., Van der Nest M. (2000): Synchronization of oestrus in goats: dose effect of progestagen. Small Ruminant Research, 36, 201-207. Go to original source... Go to PubMed...
    10. Greyling J.P.C., Erasmus J.A., Taylor G.J., Van der Merwe S. (1997): Synchronization of estrus in sheep using progestagen and inseminating with chilled semen during the breeding season. Small Ruminant Research, 26, 137-143. Go to original source...
    11. Husein M.Q., Bailey M.T., Ababneh M.M., Romano J.E., Crabo B.G., Wheaton J.E. (1998): Effect of eCG on the pregnancy rate of ewes transcervically inseminated with frozen-thawed semen outside the breeding season. Theriogenology, 49, 997-1005. Go to original source... Go to PubMed...
    12. Instat (1990-1993): Anon. Grophpad instat copyright (c) Grophpad software.
    13. Keisler D.H., Buckrell B.C. (1997): Breeding strategies. In: Youngquist R.S. (ed.): Current Therapy in Large Animal Theriogenology. WB Saunders & Co., Philadelphia. 603-611.
    14. Maurel M.C., Roy F., Herve V., Bertin J., Vaiman D., Cribiu E., Manfredi E., Bouvier F., Lantier I., Boue P., Guillou F. (2003): Reponse immunitaire a la eCG utilisee dans le traitement de I'induction d'ovulation chez la chevre et la brebis. Gynecologie Obstetrique & Fertilite, 31, 766-769. Go to original source... Go to PubMed...
    15. Morand-Fehr P., Hervieu J., Santucci P. (1989): Notation de I'etat corporel: a vos stylos. La Chevre, 175, 39-42.
    16. Mylne M.J.A., Hunton J.R., Buckrell B.C., Marsh D.J. (1997): Artificial insemination of sheep. In: Youngquist R.S. (ed.): Current Therapy in Large Animal Theriogenology. WB Saunders & Co., Philadelphia. 585-594.
    17. Pearce D.T., Robinson T.J. (1985): Plasma progesterone concentrations, ovarian and endocrinological responses and sperm transport in ewes with synchronized oestrus. Journal of Reproduction and Fertility, 75, 49-62. Go to original source... Go to PubMed...
    18. Rosado J., Silva E., Galina M.A. (1998): Reproductive management of hair sheep with progesterone and gonadotropins in the tropics. Small Ruminant Research, 27, 237-242. Go to original source...
    19. Scaramuzzi R.J., Martin G.B. (1984): Pharmacological agents for manipulating oestrus and ovulation in the ewe. In: Lindsay D.R., Pearce D.T. (ed.): Reproduction in Sheep. Cambridge University Press, New York. 316-325.
    20. Simonetti L., Blanco M.R., Gardon J.C. (2000): Estrus synchronization in ewes treated with sponges impregnated with different doses of medroxyprogesterone acetate. Small Ruminant Research, 38, 243-247. Go to original source... Go to PubMed...
    21. Ungerfeld R., Rubianes E. (1999): Estrus response to the ram effect in Corriedale ewes primed with medroxyprogesterone during the breeding season. Small Ruminant Research, 32, 89-91. Go to original source...
    22. Ungerfeld R., Rubianes E. (2002): Short term primings with different progestogen intravaginal devices (MAP, FGA, and CIDR) for eCG-estrous induction in anestrus ewes. Small Ruminant Research, 46, 63-66. Go to original source...
    23. Vinoles C., Meikle A., Forsberg M., Rubianes E. (1999): The effct of subluteal levels of exogenous progesterone on follicular dynamics and endocrine patters during the early luteal phase of the ewe. Theriogenology, 51, 1351-1361. Go to original source... Go to PubMed...
    24. Vinoles C., Forsberg M., Banchero G., Rubianes E. (2001): Effect of long-term and short-term progestagen treatment on follicular development and pregnancy rate in cyclic ewes. Theriogenology, 55, 993-1004. Go to original source... Go to PubMed...
    25. Zarkawi M., Ai-Merestani M.R., Wardeh M.F. (1999): Induction of synchronized oestrous and early pregnancy diagnosis in Syrian Awassi ewes, outside the breeding season. Small Ruminant Research, 33, 99-102. Go to original source...
    26. Zeleke M., Greyling J.P.C., Schwalbach L.M.J., Muller T., 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, 47-53. Go to original source...

    This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY NC 4.0), which permits non-comercial use, distribution, and reproduction in any medium, provided the original publication is properly cited. No use, distribution or reproduction is permitted which does not comply with these terms.


    Return to the content