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Journal of Dairy Science Vol. 51 No. 2 215-216
© 1968 by American Dairy Science Association ®
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Observations on the Size of Bovine Ova1

Durward Olds, A. P. Graden, C. R. Mochow and L. R. Mutter

Department of Animal Sciences, University of Kentucky, Lexington

ABSTRACT

The average outside diameter (including the zona pellucida) of 29 unfertilized cow ova was 171.5 ± 13.8 µ (SD). The zona was 13.4 ± 1.4 µ thick and the diameter of the vitellus averaged 120.2 ± 6.9 µ. The average ouside diameter of 46 fertilized ova was 166.4 ± 16.1 µ. The vitelli of unfertilized ova were responsive to osmotic pressure changes.

FOOTNOTES

1 The investigation reported in this paper (no. 67-5-76) is in connection with a project of the Kentucky Agricultural Experiment Station and is published with the approval of the Director.




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