Patterns of oviducal motility in the cow during the oestrous cycle
Microtransducers sensitive to changes in internal diameter were chronically implanted in the oviducts of 5 dairy cows. Motility patterns were recorded throughout 9 oestrous cycles. Cyclic variations in patterns of motility were observed and compared with circulating concentrations of plasma progeste...
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Published in | Journal of reproduction & fertility Vol. 83; no. 2; pp. 537 - 543 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
England
Society for Reproduction and Fertility
01.07.1988
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Subjects | |
Online Access | Get full text |
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Summary: | Microtransducers sensitive to changes in internal diameter were chronically implanted in the oviducts of 5 dairy cows. Motility
patterns were recorded throughout 9 oestrous cycles. Cyclic variations in patterns of motility were observed and compared
with circulating concentrations of plasma progesterone. Luteal-phase motility patterns were of low amplitude and frequency.
The frequency and amplitude of motility increased 3–5 days before behavioural oestrus. This activity consisted primarily of
longitudinal muscle contractions, with an interspacing of circular muscle activity occurring during oestrus. Patterns of activity
after oestrus were similar to those before oestrus, with activity decreasing 3–5 days after oestrus. Transducers implanted
bilaterally in 2 animals permitted observation of asynchronous patterns between right and left oviducts. Preliminary data
suggested a higher level pf activity in the oviduct ipsilateral to the active ovary. These variations may be due to a local
effect, possibly mediated by the functional ovary or the ovum.
Keywords: oviduct; motility; oestrous cycle; progesterone; cow |
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ISSN: | 0022-4251 1470-1626 1741-7899 |
DOI: | 10.1530/jrf.0.0830537 |