Hostname: page-component-77c89778f8-7drxs Total loading time: 0 Render date: 2024-07-19T22:24:06.890Z Has data issue: false hasContentIssue false
  • English
  • Français

Comparison of lambing outcome in ewes after synchronization of oestrus by progestagen or prostaglandin treatment

Published online by Cambridge University Press:  27 March 2009

M. P. Boland ,
F. Lemainque  and
I. Gordon
M. P. Boland
Affiliation:
Department of Agriculture, University College, Lyons Estate, Newcastle P.O. Co. Dublin, Eire
F. Lemainque
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

It has been shown (Gordon, 1975) that certain progestagens administered intravaginally can be highly effective in the control of oestrus, ovulation and fertility in ewes. Prostaglandin (PGF2α) when infused into the uterine vein ipsilateral to the ovary containing the corpus luteum has been shown to result in luetolysis and a return to oestrus in a high proportion of ewes (Hearnshaw, Restall & Gleeson, 1973). Synthetic analogues of PGF2α have also been shown to have a marked luteolytic effect in ewes (Baird & Scaramuzzi, 1975). Variable fertility has been reported following the use of prostaglandin or its analogue for oestrous synchronization (Jennings, 1975; Haresign, 1976; Fairnie, Cumming & Martin, 1976; Lightfoot, Croker & Marshall, 1976; Trounson, Willadsen & Moor, 1976). Low fertilization has been reported after the use of a prostaglandin analogue and artificial insemination at a predetermined time in ewes (Boland, Gordon & Kelleher, 1978). The purpose of the present experiment was to extend these observations, using a ram in natural service after employing a double prostaglandin injection regime or an intravaginal progestagen treatment for the control of oestrus in cyclic sheep.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 91 , Issue 3 , December 1978 , pp. 765 - 766
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

Allison, A. J. (1978). Short returns in ewes synchronized with prostaglandins. New Zealand Veterinary Journal 26, 34–35.CrossRefGoogle ScholarPubMed
Baird, D. T. & Scaramuzzi, R. J. (1975). Prostaglandin F2α and luteal regression in the ewe: Comparison with 16 Aryloxyprostaglandin (I.C.I. 80,996). Annales de Biologie Animale, Biochimie, Biophysique 15, 161–174.Google Scholar
Boland, M. P., Gordon, I.& Kelleher, D. (1978). The effect of treatment by prostaglandin analogue (I.C.I. 80, 996) or progestagen (SC-9880) on ovulation and fertilization in cyclic ewes. Journal of Agricultural Science, Cambridge. 91, 727–730.CrossRefGoogle Scholar
Fairnie, I. J., Cumming, I. A. & Martin, E. R. (1976). Use of the prostaglandin analogue, I.C.I. 80,996 to synchronise ovulation in sheep in an artificial insemination programme. Proceeding of the Australian Society of Animal Production 11, 133–136.Google Scholar
Fukui, Y. & Roberts, E. M. (1977 a). Fertility of ewes treated with prostaglandin F2α and artificially inseminated at predetermined intervals thereafter. Australian Journal of Agricultural Research 28, 891–897.Google Scholar
Fukui, Y. & Roberts, E. M. (1977 b). Sperm transport after non-surgical intra-uterine insemination with frozen semen in ewes treated with prostaglandin F2α. Journal of Reproduction and Fertility 51, 141–143.Google Scholar
Gordon, I. (1975). The use of progestagens in sheep bred by natural and artificial insemination. Annales de Biologie Animale, Biochimie, Biophysique 15, 303–315.Google Scholar
Haresign, W. (1976). Controlled breeding in sheep using the prostaglandin analogue I.C.I. 80,996. Animal Production 22, 137 (Abs.).Google Scholar
Hearnshaw, H., Restall, B. J. & Gleeson, A. R. (1973). Observations on the luteolytic effects of prostaglandin F2α during the oestrus cycle and early pregnancy in the ewe. Journal of Reproduction and Fertility 32, 322–323.CrossRefGoogle Scholar
Jennings, J. (1975). Effect of I.C.I. 80,996 on conception rate in ewes. In Animal Production Research Report (An Foras Talunlais), pp. 34–35.Google Scholar
Lightfoot, R. J., Croker, K. P. & Marshall, R. (1976). Use of a prostaglandin analogue (I.C.I. 80,996) for the synchronization of oestrus and lambing in Merino ewes. Proceeding of the International Sheep Breeding Congress, Muresk and Perth (ed. Tomes, G. J., Robertson, D. E. and Lightfoot, R. J.), pp.449–454.Google Scholar
Smith, P. A., Boland, M. P. & Gordon, I. (1978). Conception rate in ewes. Effect of method of breeding and number of inseminations. Journal of Agricultural Science, Cambridge. 91, 511–512.Google Scholar
Trounson, A. O., Willadsen, S. M. & Moor, R. M. (1976). Effect of prostaglandin analogue Cloprostenol on oestrus, ovulation and embryonic viability in sheep. Journal of Agricultural Science, Cambridge 86, 609–611.Google Scholar