Linked Life Data

20163654

Source:http://linkedlifedata.com/resource/pubmed/id/20163654

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2010-2-18
pubmed:abstractText
Estrous expressions in dairy cows have been shortened and weakened. Dairy heifers, on the other hand, may not have had such changes in estrous signs as observed in cows, since they have less stresses than cows. The aim of this study was to describe the duration of estrus in a herd of dairy heifers. A total of 56 Holstein Friesian heifers estrus was synchronized using two different hormonal protocols. They were checked for primary and secondary estrous signs with the help of heat detection devices for 48 h at an interval of 4 h starting at 16.00 hour, one day after PGF(2alpha) treatment. Onset and end of standing estrus during 48 h observation period was recorded in 35 of the 44 heifers coming into estrus within 5 days after PGF(2alpha) treatment during the observation period. The duration of standing estrus on the average (+/-SD) was 9.7 +/- 5.3 h. Percentage of heifers with standing estrus longer than 12 h was 40%, and 53% showed standing estrus only for 4-8 h. It is indicated that duration of estrus in dairy heifers has been shortened recently.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1740-0929
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
80
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
649-54
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Duration of estrus induced after GnRH-PGF2alpha protocol in dairy heifer.
pubmed:affiliation
Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Faculty of Agriculture, Yamaguchi University, Yamaguchi, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't