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

Volumn 37, Issue 1-2, 2000, Pages 159-163

  Das, G K ^a   Naqvi, S M K ^a   Gulyani, R ^a   Pareek, S R ^a   Mittal, J P ^a  

^a CENTRAL SHEEP AND WOOL RESEARCH INSTITUTE   (India)

Author keywords

Dose; Estrus; Fertility; Progesterone; Sheep

Indexed keywords

EID: 0034121615     PISSN: 09214488     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0921-4488(99)00151-0     Document Type: Article

References (24)

1. Allison A.J., Robinson T.J. The effect of dose level of intravaginal progestagenon sperm transport, fertilization and lambing in the cyclic Merino ewe. J. Reprod. Fertil. 22:1970;515-531.
2. Anon, 1996-1997. Annual Progress Report. Central Sheep and Wool Research Institute, Avikanagar, India, pp. 62-67.
3. Crosby T.F., Boland M.P., Gordon I. Effect of progesterone/progestogen treatments on induction of pregnancy in ewes during late anoestrus. J. Anim. Sci. 57(Suppl.):1983;26.
4. Crosby T.F., Boland M.P., Gordon I. Effect of progestagen treatments on incidence of oestrus and pregnancy rates in ewes. Anim. Reprod. Sci. 24:1991;109-118.
5. Das, G.K., Naqvi, S.M.K., Gulyani, R., Bonde, S.W., Pareek, S.R., Mittal, J.P., 1997. Estrus induction and synchronisation in acyclic native ewes during summer season. Proc. 3rd Nat. Cong. Assist. Reprod. Tech. Advances in Infertility Management, February 7-11, Calcutta, India, pp. 217-221.
6. Das G.K., Naqvi S.M.K., Gulyani R., Pareek S.R., Mittal J.P. Effect of Progesterone and PMSG treatments on estrus response and fertility in acycling sheep during summer. Indian J. Anim. Sci. 69:1999;178-179.
7. Faure A.S., Boshoff D.A., Burger F.J.L. The effect of whole and halved sponges combined with either subcutaneous or intravenous administration of PMSG on synchronization of the estrous cycle of Karakul ewes. S. Afr. J. Anim. Sci. 13:1983;157-160.
8. Gordon, I.,1983. Controlled Breeding In Farm Animals. Pergamon Press, Oxford, UK.
9. Gordon, I.,1997. Controlled Reproduction In Sheep and Goats. CAB International, Wallingford, Oxon, UK.
10. Greyling J.P.C., Erasmus J.A., Taylor G.J., van der Merwe S. Synchronization of estrus in sheep using progestagen and inseminating with chilled semen during the breeding season. Small Rumin. Res. 26:1997;137-143.
11. Greyling J.P.C., Kotze X., Taylor G.J., Hagendijk W.J. Synchronization of oestrus in sheep: Use of different doses of progestagen outside the normal breeding season. S. Afr. J. Anim. Sci.24:1994;33-37.
12. Hamra A.H., Mcnally J.W., Mareek J.M., Carlon K.M., Wheaton J.E. Comparison of progesterone sponges, cronolone sponges and controlled internal drug release dispensers on fertility in anoesrtus ewes. Anim. Reprod. Sci. 18:1989;219-226.
13. Henderson, D.C., 1991. The reproductive cycle and its manipulation. In: Martin, W.B., Aitken, T.D. (Eds.), Diseases Of Sheep. Blackwell, Oxford, UK.
14. MacDonnell H.F. Effect of progesterone impregnated sponge treatment on peripheral plasma hormone levels and fertility in the cyclic ewe. Theriogenology. 24:1985;575-586.
15. MacDonnell H.F., Crowley J.P. The effect of progesterone impregnated sponges on fertility in anoestrous ewes. Vet. Sci. Commun. 2:1978;115-130.
16. Naqvi S.M.K., Gulyani R., Pareek S.R. Estrus synchronisation with progesterone impregnated vaginal sponges during summer season. Indian J. Anim. Reprod. 17:1996;15-16.
17. Robinson T.J. Control sheep breeding: Update 1980-1985. Aust. J. Biol. Sci. 41:1988;1-13.
18. Robinson T.J., Quinlivan T.D., Baxter C. The relationship between dose of progestagen and method of preparation of intravaginal sponges on their effectiveness for the control of ovulation in the ewe. J. Reprod. Fertil. 17:1968;471-483.
19. Sahni K.L., Tewari S.B., Sahni M.S. Effect of season on the occurance of oestrus and fertility in different breeds of sheep under semi-arid conditions. Indian Vet. J. 53:1976;515-522.
20. Smith P.A. Effect of progestagen employed in controlled breeding on the outcome of artificial insemination in sheep. Anim. Breed. Abstr. 46:1978;5768.
21. Smith P.A., Boland M.P., Gordon I. Effect of dose of Cronolone in intravaginal sponges on lambing outcome to fixed-time A.I. J. Agric. Sci. Cambridge. 96:1981;253-254.
22. Snedecor, G.W., Cochran, W.G., 1967. Statistical Methods, 6th Edition. Oxford and IBH, New Delhi, India.
23. Walker S.K., Smith D.H., Godfrey B., Seamark R.F. Time of ovulation in the South Australian Merino ewe following synchronization of estrus 1. Variation within and between flocks. Theriogenology. 31:1989;545-553.
24. Wheaton, J.E., Hamra, A., Sabeur, K., Capstick, W.E., 1984. Treatmentof anoestrus ewes with progestogens, PMSG and gonadotrophins releasing hormone (GnRH). Proc. 10th Int. Cong. Anim. Reprod. A.I. University of Illinois, Urbana Champaign, USA., p. 356.