Abstract
The extent and timing of embryonic mortality in heifers, normal cows and repeat breeder cows has been reviewed. Average fertilisation rates for normal heifers and cows were 88 and 90 percent while calving rate to a single service averaged 55 percent overall. Based on a fertilisation rate of 89 percent this is equivalent to a total level of embryonic mortality of the order of 39 percent. In normal cows, embryonic mortality of the order of 38 percent. In normal cows, embryonic mortality would seem to occur gradually after fertilisation but with the greatest increment of loss occurring between about Days 15 to 18. Embryo losses after implantation through to full term are of the order of 5 to 8 percent. Reports on the extent and timing of embryonic mortality in repeat breeder cows are inconsistent. The unilateral or bilateral distribution of two embryos within the uterus had no effect on subsequent embryo or foetal mortality.
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References
Almeida, A.P., Ayalon, N., Faingold, D., Marcus, S. Lewis, I. (1984). The relationship between uterine environment and early embryonic mortality (EEM) in normal (NB) and repeat breeder (RB) Friesian cows. Proc. 10th Int. Congr. Reprod. A.I. Vol. 1 438.
Ayalon, N. (1972). Fertility losses in normal cows and repeat breeders. Proc. 7th Int. Congr. Reprod. A.I. Munich. Vol. :1,741–744.
Ayalon, N. (1978). A review of embryonic mortality in cattle. J. Reprod. Fert. 54,483–493.
Ayalon, N. (1984) The repeat breeder problem. Proc. 10th Int. Congr. Anim. Reprod. A.I. IV, 10pp
Beardon, H. J., Hansel, W., Bratton, R.W. (1956). Fertilization and embryonic mortality rates of bulls with histories of either low or high fertility. J. Dairy Sci. 39, 312–318.
Boyd, J., Bacisch, P., Young, A., McCracken, J.A. (1969). Fertilization and embryonic losses in dairy cattle. Br. Vet. J.125 87–97.
Diskin, M. G. (1984). unpublished data
Diskin, M. G., Sreenan, J. M. (1980). Fertilization and embryonic mortality rates in beef heifers after artificial insemination. J. Reprod. Fert. 59, 463–468.
Hanrahan, J. P. (1983). The inter-ovarian distribution of twin ovulations and embryo survival in the bovine. Theriogenology 1, 4–7.
Hawk, H.W., Wiltbank, J.N., Kidder, H.E., Casida, L.E. (1955). Embryonic mortality between 16 and 34 days post breeding in cows of low fertility. J. Dairy Sci. 38, 673–676.
Henricks, D.M., Lamond, D.R., Hill, J.R., Dickey, J.F. (1971). Plasma progesterone concentrations before mating and in early pregnancy in the beef heifer. J. Anim. Sci. 33, 450–454.
Linares, T. (1982). Embryonic development in repeat breeder and virgin heifers seven days after insemination. Anim. Reprod. Sci. 4, 189–198.
Maurer, R.R., Chenault, J.R. (1983). Fertilization failure and anbryonic mortality in parous and non-parous beef cattle. J. Anim. Sci. 56, 1186–1189.
O’Farrell, K.J. (1977). A comparison of natural service and artificial insenination in seasonally calving dairy herds. Ir. J. Agric. Res. 16, 251–257.
O’Farrell, K.J., Langley, O.H., Hartigan, P.J., Sreenan, J.M. (1980). Fertilization and anbryonic survival rates in repeat breeder dairy cows. Proc. 11th Int. Congr. of Diseases of Cattle. Tel Aviv, Oct. 1980.
O’Farrell, K.J., Langley, O.H., Hartigan, P.J., Sreenan, J. M. (1983). Fertilization and embryonic survival rates in cows culled as repeat breeders. Vet. Rec. 112, 95–97.
Roche, J.F., Boland, M.P., McGeady, T.A. (1981). Reproductive wastage following artificial insemination of heifers. Vet. Rec. 109, 401–403.
Rowson, L.E.A., Lawson, R.A.S., Moor, R.M. (1971). Production of twins in cattle by egg transfer. J. Reprod. Fert. 25, 261–268.
Scanlon, P.F., Gordon, I. Sreenan, J.M. (1974). Multiple ovulations, multiple pregnancies and multiple births in Irish cattle. J. Agric. Fish. ( Dublin ) 70, 1–8.
Shelton, J.N., Heath, T.D., Old, K.C., Turnbull, G.E. (1979). Non-surgical recovery of eggs from single ovulating bovines. Theriogenology, 11, 149–152. anith, M.F., Nix., K. J., Kraoner, D.C., Amoss, M.S., Herron, M.A.
Wiltbank, J.N. (1982). Fertilization rate and early onbryonic loss in Brahman crossbred heifers. J. Anim. Sci. 54, 1005–1011.
Spitzer, J.C., Niswender, G.D., Seidel, G.E.Jr. Wiltbank, J.N. (1978). Fertilization and blood levels of progesterone and LH in beef heifers on a restricted energy diet. J. Anim. Sci. 46, 1071–1077.
Sreenan, J. M. (1977). Embryo transfer for the induction of twinning in cattle. In “Qnbryo transfer in Farm Animals”(Ed. K.J. Betteridge) (CAN. Dept. Agric.)62–66.
Sreenan, J. M. (1984). Steroid immunisation in cows: Potential for increasing ovulation and twinning rates. Proc. 10th Int. Congr. Reprod. A.I. Urbana-Champaign. Vol. IV, 6 pp.
Wishart, D.F. Young, I.M. (1974). Artificial insanination of cattle at a pre-determined time following treatment with a potent progestagen SC-21009. Vet. Rec. 95503–508.
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© 1986 ECSC, EEC, EAEC, Brussels-Luxembourg
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Sreenan, J.M., Diskin, M.G. (1986). The Extent and Timing of Embryonic Mortality in the Cow. In: Sreenan, J.M., Diskin, M.G. (eds) Embryonic Mortality in Farm Animals. Current Topics in Veterinary Medicine and Animal Science, vol 34. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5038-2_1
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DOI: https://doi.org/10.1007/978-94-009-5038-2_1
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