Delayed Ovulation in Bovine: Diagnosis and Treatment
Article Sidebar
Main Article Content
Abstract
Repeated breeder dairy cows (96) were used in this study. They were diagnosed clinically as cases of delayed ovulation and divided into five groups according to type of treatment used post insemination. Group one which includes 28 cow (1=28) treated with 1 vial of fertagyl, (2=22) treated with 2 vials of fertagyl, (3=19) treated with 5 ml of chorionic gonadotropin, (4=17) treated with 1 vial of Nymfalom and (5=10) treated with 1 vial of chorulon. Results showed that the number of cows which did not return to estrus (responded) were 16(57.14%), 12(54.54%), 9(47.47%), 12(70.6%) and 4(40%) respectively. Treatment and insemination were repeated to a number of unresponded cows and their results revealed response of 3 cows (27.27%) from group (1=11), response of 4 cows (50%) from group (2=8), response of 3 cows (42.85%) from group (3=7), response of 1 cow (20%) from group (4=5) and response of 2 (50%) from group (5=4). Data concerning the number, type, sex and viability of the offspring born from the treated cows were included in this study. Finally we may conclude that Nymfalon showed better result in treating cases of delayed ovulation and in improving their conception and pregnancy rate. The remaining treatments were also advisable in the absence of Nymfalon. The use of the same treatment again was also beneficial in some unresponded cases.
Downloads
Article Details
How to Cite
References
2. Ayalon, N. 1978. A review of embryonic mortality in cattle population. J. Reprod. Fertil. 54: 507-511.
3. Zenjanis, R. 1970. Diagnostic and therapeutic techniques in animal reproduction. 2nd edition. Baltimore, the Williams & Wilkins Co.
4. Hernandes-Ceron, J.; Zarco, L.; Lima-Tamayo, V. 1993. Incidence of delayed ovulation in Holstein heifers and its effects on fertility and early luteal function.
Theriogenology: 15(2): 69-74.
5. Van Rensburg, S.W.J and de Vos, W.H. 1962. The relation of the postpartum breeding interval to reproductive efficiency in the dairy cattle. J. Vet. Res. 29: 55-59.
6. Maurer, R.R. and Echternkamp, S.E. 1982. Hormonal asynchrony and embryonic development. Theriogenology. 17: 11-15.
7. Nolan, C.J.; Bull, R.C.; Sasser, R.G.; Ruder, C.A.; Panlasigui, P.M.; Schoeneman, H.M. and Reeves, 1,J. 1989. Postpartum reproduction in protein restricted beef cows: effect on the hypothalamo- Pituitary- ovarian axis. J. Anim. Sci. 66: 3208-3213.
8. Roche, J.F.; Crowe, M.A. and Boland, M.P. 1992. Postpartum anestrus in dairy and beef cows. Anim. Rep. Sci. 28: 371-378.
9. Hansel, W.; Spalding, R.W.; Larson, L.L.; Laster, D.B.; Wagner, W. and Braun, R.K. 1976. Pituitary ovarian relationships in the cow. J. Dairy Sci. 59: 751-755.
10. Lee, C.N.; Ax, R.L.; Pennington, J.A.; Hoffnnr, W.F. and Brown, M.D. 1981. Genetic relationship between production and breeding efficiency. J. Dairy Sci.
64(suppl.) Abst. 163.
11. Nakao, T.; Narita, S.; Tanaka, K.; Hara, H.; Shirakawa, J.; Nashiro, H.; Saga, N.; Tsunoda, N. and Kawata, K. 1983. Improvement of first-service pregnancy rate in cow with gonadotropin-releasing hormone analogue. Theriogenology, 20: 11-17.
12. Schels, H.F. and Mostafawi, D. 1978. The effect of GnRH on the pregnancy rate artificially inseminated. Vet. Rec. 103: 31-35.
13. Mauric, E.; Ax, R.L. and Brown, M.D. 1982. Gonadotropin-releasing hormone leads to improved fertility in cows. J. Dairy Sci. 65(Suppl. 1): 179 (Abstract).
14. Dekruif, A. 1978. Factors influencing the fertility of cattle population. J. Reprod. Fertil. 54: 507-511.
15. Helmen, S.D. and Birtt, J.H. 1983. Progesterone secretion and fertility in dairy cattle treated with (GnRH) before ovulation or human chorionic gonadotropin
16. (hCG) after ovulation. J. Dairy Sci. 66(Suppl. 1) 228 (Abst.).
17. Eissa, H.M. and el-Belely, M.S. 1996. Gondotropin releasing hormone treatment of Holestein cows with follicular cysts monitored by skim milk progesterone
determination. Vet. Med. Praha. 41(1): 1-5.
18. Schams, D.; Schallenberger, E.; Hoffman, B. and Karg, H. 1977. The estrous cycle of cow: Hormonal parameters and time relationships concerning estrous, ovulation and electrical resistance of vaginal mucous. Acta. Endocrinol 86: 180-186.
19. Hafez, E.S.E. 1987. Reproduction in farm animals. 5th edition. Lea & Fibiger. Philadelphia. 20. Peters, K.E.; Bergfeld, E.G.; Cupp, A.S and Kajina,
F.N. 1994. Luteinizing hormone has a role in development of fully functional corpora lutea (CL) but is not required to maintain CL function in heifers. Biol.
Rep. 51(6): 1248-1254.
21. Morrow, D.A. 1980. Current therapy in theriogenology. W.B. Saunders. Philadelphia.