Hostname: page-component-77c89778f8-n9wrp Total loading time: 0 Render date: 2024-07-19T20:28:49.286Z Has data issue: false hasContentIssue false
  • English
  • Français

Conception Rate in ewes: effect of method of breeding and number of inseminations

Published online by Cambridge University Press:  27 March 2009

P. A. Smith ,
M. P. Boland  and
I. Gordon
P. A. Smith
Affiliation:
Department of Agriculture, University College, Lyons Estate, Newcastle P.O., Co. Dublin, Eire
M. P. Boland
Affiliation:
Department of Agriculture, University College, Lyons Estate, Newcastle P.O., Co. Dublin, Eire
I. Gordon
Affiliation:
Department of Agriculture, University College, Lyons Estate, Newcastle P.O., Co. Dublin, Eire
Get access Rights & Permissions [Opens in a new window]

Extract

With the development of effective methods of oestrus synchronization (Gordon, 1975), it is now possible to breed ewes at most times of the year. Encouraging conception rates have been reported following insemination (Colas & Brice, 1970; Colas et al. 1973; Gordon, 1975). A major disadvantage with the technique is the need to inseminate ewes twice at 10–14 h intervals. Because of the anatomy of the ovine cervix, it is not possible to deposit semen in the uterus as in the bovine. The present experiment was designed to compare a single or double insemination with natural service. Two types of inseminating gun were employed in an effort to deposit semen deep in the cervical folds.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 91 , Issue 2 , October 1978 , pp. 511 - 512
Copyright
Copyright © Cambridge University Press 1978

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Barlow, M., Pryce-Jones, D. & Reed, H. C. B. (1974). M.L.C. Sheep A.I. field trials; a comparison of milk and egg yolk diluents. Veterinary Record 94, 159–160.CrossRefGoogle Scholar
Colas, G. (1975). The use of progestagen SC-9880 as an aid for artificial insemination in ewes. Annales de Biologie Animale Biochimie Biophysique 15, 317–327.Google Scholar
Colas, G. & Brice, G. (1970). Fertility of ewes treated with FGA and inseminated artificially with frozen semen: Preliminary results. Annales de Zootechnique 19, 353–357.CrossRefGoogle Scholar
Colas, G., Thimonier, J., Cotjbot, M. & Ortovant, R. (1973). Fertility, prolificacy and fecundity during the breeding season of ewes artificially inseminated after treatment with flurogestone acetate. Annales de Zootechnique 22, 441–451.CrossRefGoogle Scholar
Gordon, I. (1975). Hormonal control of reproduction in sheep. Proceedings of the British Society of Animal Production 4, 79–93.Google Scholar