J. Anim Sci.
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J. Anim Sci. 1952. 11:355-360.
© 1952 American Society of Animal Science
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The Fertility of Cows Inseminated at Various Intervals after Calving1

F. P. Shannon, G. W. Salisbury and N. L. VanDemark2

University of Illinois,3

Abstract

A study was made of the fertility level of 7,071 cows inseminated at various intervals after calving. The results indicated that a minimum interval from calving to first insemination of 50 days was required for satisfactory fertility.

Footnotes

1 This paper is a part of a thesis to be submitted by the senior author to the Graduate College, University of Illinois, in partial fulfillment of the requirements for the degree of Master of Science in Dairy Science.

2 The authors wish to acknowledge with thanks their indebtedness to the officers and management of the Southern Illinois Breeding Association, Breese, Illinois, for permission to use their records and to A. N. Moeller for aid to the senior author in transcribing the records.

3 Department of Dairy Science, Urbana, Illinois.






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Copyright © 1952 by the American Society of Animal Science.