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Factors affecting growth of ovine foetuses during early gestation

Published online by Cambridge University Press:  02 September 2010

C. V. Hulet ,
W. C. Foote  and
D. A. Price
C. V. Hulet
Affiliation:
U.S. Department of Agriculture, U.S. Sheep Experiment Station Agricultural Research Service, Dubois, Idaho and Department of Animal Science, Utah State University, Logan
W. C. Foote
Affiliation:
U.S. Department of Agriculture, U.S. Sheep Experiment Station Agricultural Research Service, Dubois, Idaho and Department of Animal Science, Utah State University, Logan
D. A. Price
Affiliation:
U.S. Department of Agriculture, U.S. Sheep Experiment Station Agricultural Research Service, Dubois, Idaho and Department of Animal Science, Utah State University, Logan
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Summary

Year, type of gestation (single or twin foetuses) and age of foetus all had highly significant independent effects on both foetal weight and length (P>0·01). Twin foetuses were both longer and heavier than single foetuses at 21 to 30 days post coitum. Continuous illumination, continuous darkness and intermittent light appeared to reduce foetal length and weight (P>0·05). Control foetuses were longer and heavier than those on other treatments. Neither feeding level (75 to 150% N.R.C. maintenance requirements) nor body weight of the dam had significant effects on foetal size within the age range studied.

Type
Research Article
Information
Animal Production , Volume 11 , Issue 2 , May 1969 , pp. 219 - 223
Copyright
Copyright © British Society of Animal Science 1969

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References

REFERENCES

Cloete, J. H. L. 1939. Prenatal growth in the Merino sheep. Onderstepoort J. vet. Sci. Anim. Ind. 13: 418–558.Google Scholar
EL Sheikh, A. S., Hulet, C. V., Pope, A. L. and Casida, L. E. 1955. The effect of level of feeding on the reproductive capacity of the ewe. J. Anim. Sci. 14: 919–929.CrossRefGoogle Scholar
EL Sheikh, A. S. 1955. Ph.D. Thesis. University of Wisconsin.Google Scholar
Foote, W. D., Gooch, L. E., Pope, A. L. and Casida, L. E. 1957. The maintenance of early pregnancy in the ovariectomized ewe by injection of ovarian hormones. J. Anim. Sci. 16: 986–989.CrossRefGoogle Scholar
Foote, W. C., Pope, A. L., Chapman, A. B. and Casida, L. E. 1959. Reproduction in the yearling ewe as affected by breed and sequence of feeding levels. II. Effects on fetal development. J. Anim. Sci. 18: 463–474.CrossRefGoogle Scholar
Henning, W. L. 1939. Prenatal and postnatal sex ratio in sheep. J. agric. Res. 58: 565–580.Google Scholar
Hulet, C. V., Price, D. A. and Foote, W. C. 1968. Effects of variation in light, month of year and nutrient intake on reproductive phenomena in ewes during the breeding season. J. Anim. Sci. 27: 684–690.CrossRefGoogle ScholarPubMed
Loy, R. G., McShan, W. H., Self, H. L. and Casida, L. E. 1958. Interrelationships of number, average weight and progesterone content of corpora lutea in swine. J. Anim. Sci. 17: 405–409.CrossRefGoogle Scholar
National Research Council. 1964. Recommended nutrient allowance for domestic animals. V. Nutrient requirements of sheep. A report of the Committee on Animal Nutrition. Natn. Acad. Sci., Natn. Res. Coun. Pub. 1193. Revised 1964.Google Scholar
Wintenberger-Torres, S. 1964. The development of spontaneously ovulated and superovulated eggs from ewes with a modified progesterone equilibrium. 5th int. Congr. Anim. Reprod. A. I., 2: 414–418.Google Scholar
Wintenberger-Torres, S. and Rombauts, P. 1968. Relationship between embryonic mortality and the quantity of ovarian progesteron in the ewe. VI. Congres de Reprod. et Insem. Artif., Paris.Google Scholar