Comparison of progestin-based estrus synchronization protocols before fixed-time artificial insemination on pregnancy rate in beef heifers

Journal of Animal Science

Volumn 85, Issue 8, 2007, Pages 1933-1939

  Busch, D C ^a   Wilson, D J ^a   Schafer, D J ^b   Leitman, N R ^a   Haden, J K ^b   Ellersieck, M R ^a   Smith, M F ^a   Patterson, D J ^a  

^a UNIVERSITY OF MISSOURI   (United States)

^b MFA Inc   (United States)

Author keywords

Artificial insemination; Beef heifer; Estrus synchronization; Pregnancy rate; Progestin

Indexed keywords

FERTILITY PROMOTING AGENT; GESTAGEN; GONADORELIN; PROGESTERONE;

ANIMAL; ANIMAL DISEASE; ANIMAL HUSBANDRY; ARTICLE; ARTIFICIAL INSEMINATION; BLOOD; CATTLE; COMPARATIVE STUDY; DRUG IMPLANT; ESTRUS CYCLE; FEMALE; METHODOLOGY; PHYSIOLOGY; PREGNANCY; PREGNANCY RATE; TIME;

ANIMAL HUSBANDRY; ANIMALS; CATTLE; DRUG IMPLANTS; ESTRUS SYNCHRONIZATION; FEMALE; FERTILITY AGENTS, FEMALE; GONADOTROPIN-RELEASING HORMONE; INSEMINATION, ARTIFICIAL; PREGNANCY; PREGNANCY RATE; PROGESTERONE; PROGESTINS; TIME FACTORS;

EID: 34547626607     PISSN: 00218812     EISSN: None     Source Type: Journal    
DOI: 10.2527/jas.2006-845     Document Type: Article

References (28)

1. Anderson, K. J., D. G. LeFever, J. S. Brinks, and K. G. Odde. 1991. The use of reproductive tract scoring in beef heifers. Agri-Practice 12:19-26.
2. Atkins, J. A., D. C. Busch, J. F. Bader, D. J. Schafer, M. C. Lucy, D. J. Patterson, and M. F. Smith. 2005. GnRH-induced ovulation in heifers: Effect of stage of a follicular wave. Biol. Reprod. Spec. Issue: Abstr. W678:231.
3. Colazo, M. G., J. P. Kastelic, M. F. Martinez, P. R. Wittaker, R. Wilde, J. D. Ambrose, R. Corbett, and R. J. Mapletoft. 2004. Fertility following fixed-time AI in CIDR-treated beef heifers given GnRH or estradiol cypionate and fed diets supplemented with flax seed and sunflower seed. Theriogenology 61:1115-1124.
4. 2α (PGF), for fixed-time artificial insemination in beef heifers. J. Anim. Sci. 84(Suppl. 1):51. (Abstr.)
5. Kirby, C. J., M. F. Smith, D. H. Keisler, and M. C. Lucy. 1997. Follicular function in lactating dairy cows treated with sustained-release bovine somatotropin. J. Dairy Sci. 80:273-285.
6. Kojima, F. N., J. F. Bader, J. E. Stegner, D. J. Schafer, J. C. Clement, R. L. Eakins, M. F. Smith, and D. J. Patterson. 2004. Substituting EAZI-BREED CIDR inserts (CIDR) for melengestrol acetate (MGA) in the MGA Select protocol in beef heifers. J. Anim. Sci. 87(Suppl.1):255. (Abstr.)
7. 2α, and progesterone. J. Anim. Sci. 84:3000-3009.
8. Macmillan, K. L., and W. W. Thatcher. 1991. Effects of an agonist of gonadotropin-releasing hormone on ovarian follicles in cattle. Biol. Reprod. 45:883-889.
9. Macmillan, K. L., and A. J. Peterson. 1993. A new intravaginal progesterone releasing device for cattle (CIDR-B) for oestrous synchronization, increasing pregnancy rates and the treatment of postpartum anoestrus. Anim. Reprod. Sci. 33:1-25.
10. Martinez, M. F., J. P. Kastelic, G. P. Adams, B. Cook, W. O. Olson, and R. J. Mapletoft. 2002a. The use of progestins in regimens for fixed-time artificial insemination in beef cattle. Theriogenology 57:1049-1059.
11. Martinez, M. F., J. P. Kastelic, G. P. Adams, E. Janzen, D. H. McCartney, and R. J. Mapletoft. 2000. Estrus synchronization and pregnancy rates in beef cattle given CIDR-B, prostaglandin and estradiol, or GnRH. Can. Vet. J. 41:786-790.
12. Martinez, M. F., J. P. Kastelic, G. P. Adams, and R. J. Mapletoft. 2002b. The use of a progesterone-releasing device (CIDR-B) or melengestrol acetate with GnRH, LH, or estradiol benzoate for fixed-time AI in beef heifers. J. Anim. Sci. 80:1746-1751.
13. Moreira, F., R. L. de la Sota, T. Diaz, and W. W. Thatcher. 2000. Effect of day of the estrous cycle at the initiation of a timed AI protocol on reproductive responses in dairy heifers. J. Anim. Sci. 78:1568-1576.
14. NCRBRTF. 2006. Estrus synchronization protocols for heifers, http://westcentral.unl.edu/beefrepro/pdfs/hfraisynchprotocols.pdf Accessed Jan. 24, 2007.
15. 2α. J. Anim. Sci. 73:954-959.
16. Patterson, D. J., F. N. Kojima, and M. F. Smith. 2003. A review of methods to synchronize estrus in replacement beef heifers and postpartum cows. J. Anim. Sci. 81(Suppl. 2):E166-E177.
17. Perry, G. A., M. F. Smith, and D. J. Patterson. 2002. Evaluation of a fixed-time artificial insemination protocol for postpartum suckled beef cows. J. Anim. Sci. 80:3060-3064.
18. Portaluppi, M. A., and J. S. Stevenson. 2004. Variations in the Ovsynch protocol after presynchronization of estrous cycles alter pregnancy rates in lactating dairy cows. J. Anim. Sci. 87(Suppl.1):256. (Abstr.)
19. 2α and GnRH. Theriogenology 44:915-923.
20. Schafer, D. J., D. C. Busch, M. F. Smith, and D. J. Patterson. 2006. Characterization of follicular dynamics, timing of estrus, and response to GnRH and PG in replacement beef heifers after presynchronization with a 14-day CIDR. J. Anim. Sci. 84(Suppl. 1):49. (Abstr.)
21. Sheffel, C. E., B. R. Pratt, W. L. Ferrell, and E. K. Inskeep. 1982. Induced corpora lutea in the postpartum beef cow. II. Effects of treatment with progestogen and gonadotropins. J. Anim. Sci. 54:830-836.
22. Smith, V. G., J. R. Chenault, J. F. McAllister, and J. W. Lauderdale. 1987. Response of postpartum beef cows to exogenous progestogens and gonadotropin releasing hormone. J. Anim. Sci. 64:540-551.
23. Snedecor, G. W., and W. G. Cochran. 1989. Statistical Methods. 8th ed. Iowa State Univ. Press, Ames.
24. Stegner, J. E., F. N. Kojima, M. R. Ellersieck, M. C. Lucy, M. F. Smith, and D. J. Patterson. 2004a. A comparison of progestin-based protocols to synchronize estrus in postpartum beef cows. J. Anim. Sci. 82:1016-1021.
25. Stegner, J. E., F. N. Kojima, M. R. Ellersieck, M. C. Lucy, M. F. Smith, and D. J. Patterson. 2004b. Follicular dynamics and steroid profiles in cows during and after treatment with progestin-based protocols for synchronization of estrus. J. Anim. Sci. 82:1022-1028.
26. Thatcher, W. W., F. Moreira, J. E. P. Santos, R. C. Mattos, F. L. Lopes, S. M. Pancarci, and C. A. Risco. 2001. Effects of hormonal treatments on reproductive performance and embryo production. Theriogenology 55:75-89.
27. Walker, R. S., R. M. Enns, T. W. Geary, R. G. Mortimer, B. A. Lashell, and D. D. Zalesky. 2005. Evaluation of gonadotropin-releasing hormone at fixed-time artificial insemination in beef heifers synchronized using a modified CO-Synch plus controlled internal device release protocol. Prof. Anim. Sci. 21:449-454.
28. 2α synchronization treatment in beef heifers. J. Anim. Sci. 79:2210-2216.