Comparison of 6-day progestagen treatment with Chronogest ® CR and Eazi-breed™ CIDR ® G intravaginal inserts for estrus synchronization in cyclic ewes

Small Ruminant Research

Volumn 107, Issue 2-3, 2012, Pages 141-146

  Fleisch, A ^a   Werne, S ^b   Heckendorn, F ^b   Hartnack, S ^a   Piechotta, M ^c   Bollwein, H ^a   Thun, R ^a   Janett, F ^a  

^a UNIVERSITY OF ZURICH   (Switzerland)

^b RESEARCH INSTITUTE OF ORGANIC AGRICULTURE FIBL   (Switzerland)

^c UNIVERSITY OF VETERINARY MEDICINE HANNOVER   (Germany)

Author keywords

Chronogest CR; Eazi breed CIDR G; Ewe; Fertility; Progestagen; Synchronization

Indexed keywords

ANIMALIA;

EID: 84866488989     PISSN: 09214488     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.smallrumres.2012.05.014     Document Type: Article

References (25)

1. Abecia J.A., Forcada F., González-Bulnes A. Pharmaceutical control of reproduction in sheep and goats. Vet. Clin. Food Anim. 2011, 27:67-79.
2. Allison A.J., Robinson T.J. The effect of dose level of intravaginal progestagen on sperm transport, fertilization and lambing in the cyclic merino ewe. J. Reprod. Fertil. 1970, 22:515-531.
3. Ashworth C.J., Sales D.I., Wilmut I. Evidence of an association between the survival of embryos and the periovulatory plasma progesterone concentration in the ewe. J. Reprod. Fertil. 1989, 87:23-32.
4. Bari F., Khalid M., Haresign W., Murray A., Merrell B. Factors affecting the survival of sheep embryos after transfer within a MOET program. Theriogenology 2003, 59:1265-1275.
5. Boland M.P., Crosby T.F., Gordon I. Effect of mating management and PMSG dose on lambing outcome in ewes bred in late anoestrus. J. Agric. Sci. Camb. 1981, 97:445-447.
6. Cline M.A., Ralston J.N., Seals R.C., Lewis G.S. Intervals from norgestomet withdrawal and injection of equine chorionic gonadotrophin or PG 600 to estrus and ovulation in ewes. J. Anim. Sci. 2001, 79:589-594.
7. Dixon A.B., Knights M., Pate J.L., Lewis P.E., Inskeep E.K. Reproductive performance of ewes after 5-day treatment with intravaginal inserts containing progesterone in combination with injection of prostaglandin F2α. Reprod. Domest. Anim. 2006, 41:142-148.
8. Dutt R.H. Detrimental effects of high ambient temperature on fertility and early embryo survival in sheep. Int. J. Biometeorol. 1964, 8:47-56.
9. Evans A.C.O. Ovarian follicle growth and consequences for fertility in sheep. Anim. Reprod. Sci. 2003, 78:289-306.
10. Evans A.C.O., Flynn J.D., Quinn K.M., Duffy P., Quinn P., Madgwick S., Crosby T.F., Boland M.P., Beard A.P. Ovulation of aged follicles does not affect embryo quality or fertility after a 14-day progestagen estrus synchronization protocol in ewes. Theriogenology 2001, 56:923-936.
11. Flynn J.D., Duffy P., Boland M.P., Evans A.C.O. Progestagen synchronisation in the absence of a corpus luteum results in the ovulation of a persistent follicle in cyclic ewe lambs. Anim. Reprod. Sci. 2000, 62:285-296.
12. Greyling J.P.C., Kotze W.F., Taylor G.J., Hagendijk W.J., Cloete F. Synchronization of oestrus in sheep: Use of different doses of progestagen outside the normal breeding season. S. Afr. J. Anim. Sci. 1994, 24:33-37.
13. Hawk H.W., Conley H.H. Investigation of sperm transport failures in ewes administered synthetic progestagen. J. Anim. Sci. 1972, 34:609-613.
14. Knights M., Maze T.D., Bridges P.J., Lewis P.E., Inskeep E.K. Short-term treatment with a controlled internal drug releasing (CIDR) device and FSH to induce fertile estrus and increase prolificacy in anestrous ewes. Theriogenology 2001, 55:1181-1191.
15. Leyva V., Buckrell B.C., Walton J.S. Follicular activity and ovulation regulated by exogenous progestagen and PMSG in anestrous ewes. Theriogenology 1998, 50:377-393.
16. Leyva V., Buckrell B.C., Walton J.S. Regulation of follicular activity and ovulation in ewes by exogenous progestagen. Theriogenology 1998, 50:395-416.
17. Menchaca A., Rubianes E. New treatments associated with timed artificial insemination in small ruminants. Reprod. Fertil. Dev. 2004, 16:403-413.
18. Noel B., Bister J.L., Pierquin B., Paquay R. Effects of FGA and PMSG on follicular growth and LH secretion in Suffolk ewes. Theriogenology 1994, 41:719-727.
19. Trounson A.O., Moore N.W. Effect of progesterone and oestrogen on the survival and development of fertilized ova in the ovariectomized ewe. Aust. J. Biol. Sci. 1974, 27:511-517.
20. Ungerfeld R., Rubianes E. Effectiveness of short-term progestogen primings for the induction of fertile oestrus with eCG in ewes during late seasonal anoestrus. Anim. Sci. 1999, 68:349-353.
21. Ungerfeld R., Rubianes E. Short term primings with different progestogen intravaginal devices (MAP, FGA and CIDR) for eCG-estrous induction in anestrus ewes. Small Rumin. Res. 2002, 46:63-66.
22. Viñoles C., Forsberg M., Banchero G., Rubianes E. Effect of long-term and short-term progestagen treatment on follicular development and pregnancy rate in cyclic ewes. Theriogenology 2001, 55:993-1004.
23. Welch R.A.S., Andrews W.D., Barnes D.R., Bremer K., Harvey T.G. CIDR dispensers for oestrus and ovulation control in sheep. Proceedings of the 10th International Congress on Animal Reproduction & Artificial Insemination, vol. 3 1984, 354-355.
24. Wildeus S. Current concepts in synchronization of estrus: sheep and goats. J. Anim. Sci. 2000, 77:1-14.
25. Zeileis, A., Hothorn, T., 2002. Diagnostic checking in regression relationships. R News 2, web source from http://cran.r-project.org/doc/Rnews/.