Pregnancy rate in beef heifers after synchronization to either random or programmed estrous cycles

Journal of Animal Science

Volumn 79, Issue 3, 2001, Pages 561-567

  Mathis, C P ^a,c   Hawkins, H E ^b   Sprott, L R ^a   Lunt, D K ^a   Forrest, D W ^a  

^a TEXAS A AND M UNIVERSITY   (United States)

^b King Ranch   (United States)

^c NEW MEXICO STATE UNIVERSITY   (United States)

Author keywords

Estrus; Heifers; Pregnancy; Synchronization

Indexed keywords

DRUG DERIVATIVE; ESTRADIOL; ESTRADIOL VALERATE; NORGESTOMET; PREGNANE DERIVATIVE; PROGESTERONE;

ANIMAL; ANIMAL HUSBANDRY; ARTICLE; BLOOD; CATTLE; DELAYED RELEASE FORMULATION; DRUG EFFECT; ESTRUS; ESTRUS CYCLE; EVALUATION; FEMALE; MALE; METHODOLOGY; PHYSIOLOGY; PREGNANCY; PREGNANCY RATE; RANDOMIZATION;

ANIMAL HUSBANDRY; ANIMALS; CATTLE; DELAYED-ACTION PREPARATIONS; ESTRADIOL; ESTRUS; ESTRUS SYNCHRONIZATION; FEMALE; MALE; PREGNANCY; PREGNANCY RATE; PREGNENEDIONES; PROGESTERONE; RANDOM ALLOCATION;

EID: 0035291245     PISSN: 00218812     EISSN: None     Source Type: Journal    
DOI: 10.2527/2001.793561x     Document Type: Article

References (24)

1. Bellin, M. E., H. E. Hawkins, and R. L. Ax. 1994. Fertility of range beef bulls grouped according to presence or absence of heparin-binding protein in sperm membranes and seminal fluid. J. Anim. Sci. 72:2441-2448.
2. BIF. 1996. Guidelines for Uniform Beef Improvement Programs. 7th ed Northwest Research and Extension Center, Colby, KS.
3. Brown, L. M., K. G. Odde, M. E. King, D. G. LeFever, and C. J. Newbauer. 1988. Comparison of melengestrol acetate-prostaglandin F2α to Syncro-Mate-B for synchronization in beef heifers. Theriogenology 30:1-12.
4. Brink, J. T., and G. H. Kiracofe. 1988. Effect of estrous cycle stage at Syncro-Mate-B treatment on conception and time to estrus in cattle. Theriogenology 29:513-518.
5. Burfening, P. J., D. C. Anderson, R. A. Kinkie, J. Williams, and R. L. Freidrich. 1978. Synchronization of estrus with PGF2α in beef cattle. J. Anim. Sci. 47:999-1003.
6. Inskeep, E. K. 1973. Potential uses of prostaglandins in control of reproductive cycles of domestic animals. J. Anim. Sci. 36:1149-1157.
7. Kunkle, W. E., R. S. Sand, and D. O. Rae. 1994. Effect of body condition on productivity in beef cattle. In: M. J. Fields and R. S. Sand (ed.) Factors Affecting Calf Crop. CRC Press, Boca Raton, FL.
8. Lamond, D. R. 1970. The influence of undernutrition on reproduction in the cow. Anim. Breed. Abstr. 38:359-372.
9. Lauderdale, J. W., J. F. McAllister, E. L. Moody, and D. D. Kratzer. 1980. Pregnancy rate in beef cattle injected once with PGF2α. J. Anim. Sci. 51(Suppl. 1):296 (Abstr.).
10. McGuire, W. J., R. L. Lawson and G. H. Kiracofe. 1990. Syncro-Mate-B induces estrus in ovariectomized cows and heifers. Theriogenology 34:33-37.
11. McVey, W. R., Jr., and G. L. Williams. 1989. Effects of temporary calf removal and osmotic pump delivery of gonadotropin-releasing hormone on synchronized estrus, conception to timed artificial insemination and gonadotropin secretion in norgestomet-estradiol valerate treated cattle. Theriogenology 32:969-978.
12. Mikeska, J. C., and G. L. Williams. 1988. Timing of preovulatory endocrine events, estrus and ovulation in Brahman × Hereford females synchronized with norgestomet and estradiol valerate. J. Anim. Sci. 66:939-946.
13. Miksch, E. D., D. G. LeFever, G. Mukembo, J. C. Spitzer, and J. N. Wiltbank. 1978. Synchronization of estrus in beef cattle. II. Effect of an injection of norgestomet and an estrogen in conjunction with a norgestomet implant in heifers and cows. Theriogenology 10:201-221.
14. Moseley, W. M., D. W. Forrest, C. C. Kaltenbach, and T. G. Dunn. 1979. Effect of norgestomet on peripheral levels of progesterone and estradiol-17β in beef cows. Theriogenology 11:331-341.
15. Odde, K. G. 1990. A Review of synchronization of estrus in postpartum cattle. J. Anim. Sci. 68:817-830.
16. Ott, R. L. 1993. An Introduction to Statistical Methods and Data Analysis. 4th ed. Wadsworth Publishing Co., Belmont, CA.
17. Peters, A. R. 1984. Plasma progesterone and gonadotropin concentrations following norgestomet treatment with and without cloprostenol in beef cows. Vet. Rec. 115:164-166.
18. Pratt, S. L., J. C. Spitzer, G. L. Burns, and B. B. Plyler. 1991. Luteal function, estrous response, and pregnancy rate after treatment with norgestomet and various dosages of estradiol valerate in suckled cows. J. Anim. Sci. 69:2721-2726.
19. α for synchronization of oestrus in cattle. J. Reprod. Fertil. 29:145 (Abstr.).
20. Spitzer, J. C., S. E. Mares, and L. A. Peterson. 1981. Pregnancy rate among beef heifers from timed insemination following synchronization with a progestin treatment. J. Anim. Sci. 53:1-6.
21. α. I. Influence of stage of cycle at treatment. J. Anim. Sci. 58:805-811.
22. Taylor, St. C. S., and H. A. Fitzhugh, Jr. 1971. Genetic relationships between mature weight and time taken to mature within a breed. J. Anim. Sci. 33:726-731.
23. Whitman, R. W. 1975. Weight change, body condition and beef cow reproduction. Ph. D. dissertation. Colorado State Univ., Fort Collins.
24. Wiltbank, J. N., and E. Gonzalez-Padilla. 1975. Synchronization and induction of estrus in heifers with a progestagen and estrogen. Ann. Biol. Anim. Biochim. Biophys. 15:255-262.