Hostname: page-component-77c89778f8-m42fx Total loading time: 0 Render date: 2024-07-19T18:13:17.295Z Has data issue: false hasContentIssue false
  • English
  • Français

Factors affecting the gestation length in sheep

Published online by Cambridge University Press:  27 March 2009

J. M. Forbes
J. M. Forbes
Affiliation:
Department of Agriculture, Leeds University
Get access Rights & Permissions [Opens in a new window]

Extract

The data from 555 normal pregnancies during a period of 6 years in a flock of Scottish Half bred ewes were examined for relationships between gestation length and litter size, birth weight, sex, and age of ewe. A' comparison of Scottish Half bred gestation lengths was also made with those of Specklefaced Welsh ewes.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 68 , Issue 2 , April 1967 , pp. 191 - 194
Copyright
Copyright © Cambridge University Press 1967

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

Alexander, G. (1956). Influence of nutrition upon duration of gestation in sheep. Nature, Lond. 178, 1058–9.CrossRefGoogle ScholarPubMed
Burris, M. J. & Blun, C. T. (1952). Some factors affecting gestation length and birth weight of beef cattle. J. Anim. Sci. 11, 34–41.CrossRefGoogle Scholar
Clegg, M. T. (1959). Factors affecting gestation length and parturition. Ch. xv in Reproduction in Domestic Animals. Ed. Cole, H. H. and Cupps, P. T.. New York.Google Scholar
Dickinson, A. G., Hancock, J. L., Hovell, G. J. R., Taylor, St. C. S. & Wiener, G. (1962). The size of lambs at birth—a study involving egg-transfer. Anim. Prod. 4, 64–79.Google Scholar
Foote, W. D., Tyler, W. J. & Casida, L. E. (1959). Effect of some genetic and maternal environmental variations on birth weight and gestation length in Holstein cattle. J. Dairy Sci. 42, 305–11.CrossRefGoogle Scholar
Mclaren, A. & Michie, D. (1963). Nature of the systemic effect of litter size on gestation period in mice. J. Reprod. Fertil. 6, 139–41.CrossRefGoogle ScholarPubMed
Robinson, T. J. (1965). Use of progestagen impregnated sponges inserted intravaginally or subcutaneously for the control of the oestrous cycle in the sheep. Nature, Lond., 206, 39–41.CrossRefGoogle ScholarPubMed
Spiegelberg, O. (1891). Quoted by Clegg (1959).Google Scholar
Terrill, C. E. (1944). The gestation period of range sheep. J. Anim. Sci. 3, 434–435.Google Scholar
Terrill, C. E. and Hazel, L. N. (1947). Length of gestation in range sheep. Amer. J. vet. Res. 8, 66.Google ScholarPubMed
Thompson, A. M. & Thompson, W. (1948). Lambing in relation to the diet of the pregnant ewe. Br. J. Nutr. 2, 290–305.CrossRefGoogle Scholar
Wallace, L. R. (1948). Growth of lambs before and after birth in relation to the level of nutrition. J. agric. Sci., Gamb. 38, 93–153.CrossRefGoogle Scholar