Abstract
ALTHOUGH there are reports of satisfactory lambing after artificial insemination with frozen ram semen1–4, most investigators have obtained disappointing results (reviewed by Emmens and Robinson5 and Sadleir6). It has been claimed7 that frozen ram spermatozoa penetrate to the cranial part of the cervix more slowly than those from fresh semen. In an experiment8 with a limited number of animals, cervical insemination yielded only unfertilized eggs (eight ewes), and although after tubal insemination fertilized eggs were recovered from all three ewes examined, only two out of seven ewes lambed. We have conducted two experiments with frozen semen—the first at the McCaughey Memorial Institute, Jerilderie (Table 1) and the second on a private property at Yass, NSW (Table 2).
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References
Mackepladze, I. B., Gugusvili, K. F., Bregadze, M. A., and Haratisvili, G., Zivotnovodstvo, 22 (2), 77 (1960).
Kalev, G., and Venkov, T., Fourth Intern. Cong. Anim. Reprod. Hague, 4, 972 (1961).
Lopatko, M. I., Zivotnovodstvo, 24 (10), 86 (1962).
Vlachos, K., and Tsakalof, P., Bull. Physiol. Path. Reprod. Artif. Insem. Thessaloniki, 1, 71 (1965).
Emmens, C. W., and Robinson, T. J., The Semen of Animals and Artificial Insemination (edit. by Maule, J. P.), chap. 12, 205 (Technical Communication No. 15, Commonwealth Bureau of Animal Breeding and Genetics, Edinburgh, 1962).
Sadleir, R. M. F. S., Laboratory Practice, 15, 413 (1966).
Lopyrin, A. I., and Loginova, N. V., Ovcevodstvo, 4 (8), 31 (1958).
Loginova, N. V., Ovcevodstvo, 8 (8), 20 (1962).
Nagase, H., and Niwa, T., Fifth Intern. Cong. Anim. Reprod. A.I., Trento, 4, 410 (1962).
Quinlivan, T. D., and Robinson, T. J., The Control of the Ovarian Cycle in the Sheep (edit. by Robinson, T. J.), chap. 13 (Sydney University Press, 1967).
Mattner, P. E., Austral. J. Biol. Sci., 16, 688 (1963).
Salisbury, G. W., J. Gerontol., 20, 281 (1965).
Lopyrin, A. I., Loginova, N. V., and Zeltobrjuk, N. A., Ovcevodstvo, 11 (3), 3 (1965).
Quinlivan, T. D., Martin, C. A., Taylor, W. B., and Cairney, I. M., J. Reprod. Fert., 11, 379 (1966).
Mattner, P. E., and Braden, A. W. H., Austral. J. Exp. Agric. Anim. Husb., 7, 110 (1967).
Salamon, S., Austral. J. Exp. Agric. Anim. Husb. (in the press).
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SALAMON, S., LIGHTFOOT, R. Fertilization and Embryonic Loss in Sheep after Insemination with Deep Frozen Semen. Nature 216, 194–195 (1967). https://doi.org/10.1038/216194a0
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DOI: https://doi.org/10.1038/216194a0
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