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Concentrations of LH and oestradiol-17β in plasma of the dairy cow during the post-partum acyclic period

Published online by Cambridge University Press:  02 September 2010

Elaine D. Watson
Elaine D. Watson
Affiliation:
AFRC Institute for Research on Animal Diseases, Compton, Newbury, Berkshire RG16 ONN
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Abstract

The concentrations of LH and oestradiol-17β were measured in samples of jugular venous plasma collected frequently during an 8-h period from six acyclic cows between 21 and 27 days post partum. Fluctuations in oestradiol-17β concentrations were detected. Although the mean concentrations of oestradiol were similar whether ovulation occurred within 1 week of sampling or not, the amplitude of the fluctuations in oestradiol concentrations was greater in the three cows which ovulated within 1 week of the period of sampling. Increases in the concentration of LH were frequently followed by increases in the concentrations of oestradiol.

Type
Research Article
Information
Animal Production , Volume 45 , Issue 1 , August 1987 , pp. 1 - 8
Copyright
Copyright © British Society of Animal Science 1987

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