Document Detail

Effects of AI protocol and time interval from onset of estrus to AI on conception rate in Japanese Black cows.
MedLine Citation:
PMID:  23302078     Owner:  NLM     Status:  In-Data-Review    
Two different artificial insemination (AI) protocols were investigated to determine the effect of the time interval from the onset of estrus (as detected by a pedometer) to the AI on the conception rate in Japanese Black cows. Seventy-three cows were divided into two groups that received AI either after the induction of synchronized ovulation (synchronized AI group; n = 26) or at the time of observed estrus (control AI group; n = 47). Each group was further divided into two subgroups, which were artificially inseminated either 0-12 h (early AI group; n = 21) or 12-24 h (late AI group; n = 52) after the onset of estrus. There was no significant difference in the conception rate between the synchronized AI and control AI groups. The AI protocol and the detection of estrus using a threshold of counted steps (as measured by a pedometer) in this study could be effective for planned reproduction management without the observation of standing estrus in Japanese Black cows.
Koichiro Hemmi; Ikuo Kobayashi; Makoto Kajisa; Go Kitahara; Kiichi Fukuyama; Hiroshi Harada; Shunichi Kamimura
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Publication Detail:
Type:  Journal Article     Date:  2012-06-27
Journal Detail:
Title:  Animal science journal = Nihon chikusan Gakkaihō     Volume:  84     ISSN:  1740-0929     ISO Abbreviation:  Anim. Sci. J.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-01-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100956805     Medline TA:  Anim Sci J     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  23-7     Citation Subset:  IM    
Copyright Information:
© 2012 The Authors. Animal Science Journal © 2012 Japanese Society of Animal Science.
Faculty of Agriculture, University of Miyazaki, Miyazaki Soo Agricultural Mutual Aid Association, Kagoshima, Japan.
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