Source:http://linkedlifedata.com/resource/pubmed/id/16725602
Switch to
| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
5
|
| pubmed:dateCreated |
2006-5-26
|
| pubmed:abstractText |
Limited multiple ovulation (2-4 CL's) in heifers was attempted by feeding a low or a high plane of nutrition during an estrous cycle and injecting a low dose of PMSG at day 16 of that cycle. Multiple ovulation was achieved in 52% of the 19 dairy x beef crossbred heifers that received 1200 I.U. of PMSG. The ratio of the number of heifers which ovulated between 2-4 follicles to those ovulating 1 and more than 4 was higher (P<0.05) in heifers which were fed a high plane of nutrition than in those which were fed a low plane of nutrition. Thirty-six hours after the PMSG injection and prior to estrus, the concentration of E(2)-17beta was less in heifers with 1 growing follicle developing into 1 CL than in heifers with 2 or >2 growing follicles developing into CL's (P<0.01). Heifers with >2 growing follicles developing into CL's had more E(2)-17beta than those which eventually formed 2 CL's (P<0.01). Moreover, in heifers with >2 CL, E(2)-17beta concentration increased regularly until at least 96 hrs after the PMSG injection, while in heifers with 1 CL or 2 CL's, the concentration plateaued at 60 hrs after the PMSG injection. Progesterone concentration during proestrus was lower in heifers that developed >2 CL's than in those with 1 or 2 CL's (P<0.05).
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
|
| pubmed:month |
May
|
| pubmed:issn |
0093-691X
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
15
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
433-41
|
| pubmed:year |
1981
|
| pubmed:articleTitle |
Limited multiple ovulation in heifers fed high plane of nutrition before PMSG stimulation and steroid hormone concentrations in single, twin and multiple ovulators.
|
| pubmed:affiliation |
Research Station, Agriculture Canada, Lennoxville, Quebec JIM IZ3, Canada.
|
| pubmed:publicationType |
Journal Article
|