MODIFICATION OF THE DIRECTION OF UTERINE CONTRACTIONS BY INTRA-UTERINE DEVICES IN THE EWE

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Authors:
T. H. BRINSFIELD
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and
H. W. HAWK
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DOI:
https://doi.org/10.1530/jrf.0.0180535
Volume/Issue:
Volume 18: Issue 3
Page Range:
535–537
Article Type:
Research Article
Online Publication Date:
Apr 1969
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Summary.

The direction of uterine contractions in vivo was studied in oestrous ewes by recording the motility of exteriorized uteri on cine film. In eight control ewes, 58% of 1156 contractions moved towards the oviduct, while 16% moved towards the cervix. In eight ewes with a plastic spiral in the lumen of one horn, only 17% of 927 contractions moved towards the oviduct; 70% of the contractions moved towards the cervix. The effect of the IUD on the direction of uterine contractions may explain inhibition of sperm transport and ovum fertilization in `IUD' ewes.

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Print ISSN:
1470-1626
Online ISSN:
1741-7899