Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-15T02:06:38.723Z Has data issue: false hasContentIssue false
  • English
  • Français

Induction of oestrus in ewes using a controlled internal drug release device and PMSG

Published online by Cambridge University Press:  27 March 2009

W. M. C. Maxwell  and
D. R. Barnes
W. M. C. Maxwell
Affiliation:
Animal Breeding and Research Institute, Katanning, W.A., Australia
D. R. Barnes
Affiliation:
Ruakura Animal Research Station, Hamilton, New Zealand
Get access Rights & Permissions [Opens in a new window]

Extract

A number of methods have been developed for synchronization of oestrus in sheep (reviewed by Maxwell, 1984), but the most successful have been based on the suppression of the oestrous cycle by treatment with a polyurethane progestagenimpregnated intravaginal sponge (Robinson, 1965). A precise synchronization of oestrus and ovulation for artificial insemination (A.I.) is obtained following a 12- to 14-day treatment with the intravaginal sponge and an injection of pregnant mares serum gonadotrophin (PMSG) at sponge removal (Robinson & Smith, 1967). This allows a single fixed time A.I. to be performed on all ewes without the need for detection of oestrus.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 106 , Issue 1 , February 1986 , pp. 201 - 203
Copyright
Copyright © Cambridge University Press 1986

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

Crosby, T. F., Boland, M. P. & Gordon, I. (1983). Effect of progesterone/progestagen treatments on the induction of pregnancy in ewes during late anoestrus. Journal of Animal Science Supplement 1, 471.Google Scholar
Harvey, T. G., Johnson, D. L., Tervit, H. R. & Welch, R. A. S. (1984). Synchronisation and artificial insemination of ewes – techniques which have possible commercial application. Proceedings of the New Zealand Society of Animal Production 44, 7–9.Google Scholar
Maxwell, W. M. C. (1984). Current problems and future potential of artificial insemination programmes. In Reproduction in Sheep (ed. Lindsay, D. R. and Pearce, D. T.), pp. 291–298. Australian Academy of Science and Australian Wool Corporation, Canberra, A.C.T.Google Scholar
Maxwell, W. M. C, Butler, L. G. & Wilson, H. R. (1984). Intra-uterine insemination of ewes with frozen semen. Journal of Agricultural Science, Cambridge 102, 233–235.CrossRefGoogle Scholar
Robinson, T. J. (1965). Use of progestagen-impregnated sponges inserted intravaginally or subcutaneously for the control of the oestrous cycle in the sheep. Nature, London 206, 39–41.CrossRefGoogle ScholarPubMed
Robinson, T. J. & Smith, J. F. (1967). The evaluation of SC-9880-impregnated intravaginal sponges used with or without PMS for the advancement of the breeding season of British breed ewes. In The Control of the Ovarian Cycle in the Sheep (ed. Robinson, T. J.), pp. 144—157. Sydney University Press.Google Scholar
Visser, D. & Salamon, S. (1973). Fertility of ram spermatozoa frozen in a Tris-based diluent. Australian Journal of Biological Sciences 26, 513–516.CrossRefGoogle Scholar
Welch, R. A. S., Andrewes, W. D., Barnes, D. R., Bremner, K. & Harvey, T. G. (1984). CIDR dispensers for oestrus and ovulation control in sheep. Proceedings of thelOth International Congress on Animal Reproduction and Artificial Insemination, Urbana, 10–14 06 1984, I, 354.Google Scholar