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Estimation of pituitary secretion rate during the reproductive cycle of sheep

Published online by Cambridge University Press:  27 March 2009

K. S. Lindsay ,
I. R. Fleet ,
D. E. Walters  and
R. B. Heap
K. S. Lindsay
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Cambridge Research Station, Babraham, Cambridge CB2 4AT, UK
I. R. Fleet
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Cambridge Research Station, Babraham, Cambridge CB2 4AT, UK
D. E. Walters
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Cambridge Research Station, Babraham, Cambridge CB2 4AT, UK
R. B. Heap
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Cambridge Research Station, Babraham, Cambridge CB2 4AT, UK
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Summary

A technique has been developed for the measurement of pituitary hormone secretion rates in conscious sheep. The technique involves the continuous and simultaneous sampling of blood from the carotid artery and jugular vein and the measurement of cephalic blood flow by an indicator dilution technique. Veno-arterial differences in hormone concentrations multiplied by cephalic blood flow gave average secretion rates which were measured after single or repeated large doses of luteinizing hormone releasing hormone (LHRH) and thyrotrophin-releasing hormone (TRH) at various times in the reproductive cycle.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 114 , Issue 2 , April 1990 , pp. 213 - 218
Copyright
Copyright © Cambridge University Press 1990

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References

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