Document Detail

Effects of insemination-ovulation interval on fertilization rates and embryo characteristics in dairy cattle.
MedLine Citation:
PMID:  16934864     Owner:  NLM     Status:  MEDLINE    
The objective of this study was to examine effects of the interval between insemination and ovulation on fertilization and embryo characteristics (quality scored as good, fair, poor and degenerate; morphology; number of cell cycles and accessory sperm number) in dairy cattle. Time of ovulation was assessed by ultrasonography (every 4h). Cows were artificially inseminated once between 36h before ovulation and 12h after ovulation. In total 122 oocytes/embryos were recovered 7d after ovulation. Insemination-ovulation interval (12h-intervals) affected fertilization and the percentages of good embryos. Fertilization rates were higher when AI was performed between 36-24 and 24-12h before ovulation (85% and 82%) compared to AI after ovulation (56%). AI between 24 and 12h before ovulation resulted in higher percentages of good embryos (68%) compared to AI after ovulation (6%). Insemination-ovulation interval had no effect on number of accessory sperm cells and number of cell cycles when corrected for embryo quality. This study showed that the insemination-ovulation interval with a high probability of fertilization is quite long (from 36 to 12h before ovulation). However, the insemination-ovulation interval in which this fertilized oocyte has a high probability of developing into a good embryo is shorter (24-12h before ovulation).
J B Roelofs; E A M Graat; E Mullaart; N M Soede; W Voskamp-Harkema; B Kemp
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-08-28
Journal Detail:
Title:  Theriogenology     Volume:  66     ISSN:  0093-691X     ISO Abbreviation:  Theriogenology     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-11-13     Completed Date:  2007-07-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0421510     Medline TA:  Theriogenology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2173-81     Citation Subset:  IM    
Adaptation Physiology Group, Wageningen University, P.O. Box 338, 6700 AH Wageningen, The Netherlands.
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MeSH Terms
Cattle / embryology,  physiology*
Fertilization / physiology*
Insemination, Artificial / methods,  veterinary
Ovulation / physiology*
Sperm Count / veterinary
Sperm-Ovum Interactions / physiology*
Spermatozoa / physiology*
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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