Linked Life Data

19932503

Source:http://linkedlifedata.com/resource/pubmed/id/19932503

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2009-12-17
pubmed:abstractText
The objectives of this study were to examine the relationships between periovulatory endocrine events, ovarian activity, and embryo survival after artificial insemination (AI) in cattle (Bos taurus). Eighty-four reproductively normal beef heifers were estrus synchronized using a prostaglandin-based regimen. Artificial insemination was performed between 5 and 21h after heat onset. Ultrasonic examination of ovarian structures began 12h after the onset of heat and continued every 6h until confirmed ovulation. Blood samples were collected for measurement of estradiol, progesterone, and insulin-like growth factor-1 (IGF-1). Pregnancy diagnosis was conducted on Days 30 and 100 after AI. Embryo survival was defined as the presence of an embryo with a detectable heartbeat in a clear amniotic sac at Day 30 postinsemination. There was no effect of the intervals from the onset of heat to AI or ovulation or from AI to ovulation on embryo survival (P>0.10). There was a tendency (P=0.09) of an inverse relationship between preovulatory follicle size and embryo survival that was unrelated to concentrations of estradiol or IGF-1 during the periovulatory period (P>0.05). There was evidence (P=0.08) of a positive association between embryo survival and concentrations of progesterone on Day 7; however, this relationship was independent (P<0.05) of hormonal and follicular measurements during the periovulatory period. This study shows that heifers could be inseminated up to 31.5h before ovulation without compromising the probability of embryo survival. This study suggests that there is an optimum range of follicle size within which high embryo survival rates can be achieved.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1879-3231
pubmed:author
pubmed:issnType
Electronic
pubmed:day
15
pubmed:volume
73
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
190-8
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
The relationship between periovulatory endocrine and follicular activity on corpus luteum size, function, and subsequent embryo survival.
pubmed:affiliation
Teagasc Animal Production Research Centre, Athenry, Co. Galway, Ireland.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't