Document Detail

A morphometric analysis of the corpus luteum of the cow during the estrous cycle and early pregnancy.
MedLine Citation:
PMID:  16727464     Owner:  NLM     Status:  In-Data-Review    
Corpora lutea were collected from cows on Days 6, 8, 10, 12, 14, 16, 18 and 19 of the estrous cycle and early pregnancy (n=2/d) and were examined by light microscopy. Mean lutein cell diameter was significantly (P<0.05) greater in pregnant than in cyclic cows on Days 6, 8, 10, 12, 16, 18 and 19 (cyclic versus pregnant: Day 6: 13.9 +/- 0.22 vs 14.9 +/- 0.24; Day 8: 13.8 +/- 0.20 vs 15.4 +/- 0.2; Day 10: 14.8 +/- 0.24 vs 17.4 +/- 0.24; Day 12: 13.2 +/-0.25 vs 17.9 +/- 0.31; Day 16: 13.9 +/- 0.28 vs 16.5 +/- 0.31; Day 18: 13.0 +/- 0.22 vs 16.5 +/- 09.36, and Day 19: 15.0 +/- 0.23 vs 17.6 +/- 0.33 mum, respectively). The distribution of cell sizes was leptokurtotic throughout the estrous cycle and the first 10 d of pregnancy, but tended towards bimodality after Day 14 of pregnancy. The proportion of lutein cell cytoplasm occupied by vacuoles was lower in pregnant than in cyclic cows from the 12th day post estrus, but there was a marked (P<0.05) increase in vacuolation of cells from cows undergoing luteolysis. Stainable intercellular collagen was also less abundant in pregnant than cyclic cows from the 12th day post estrus. The higher rate of progesterone secretion of pregnant, compared with cyclic cows may be attributed to the greater numbers and greater contribution to luteal mass of large lutein cells in the corpus luteum of pregnancy.
T J Parkinson; A Turvey; L J Jenner
Related Documents :
3442694 - Determination of the source of immunoreactive relaxin in the cat.
11999314 - Equine placentation.
10864804 - Production of interferon by red deer (cervus elaphus) conceptuses and the effects of ro...
1412064 - A decade of rabbit fertility data: study of historical control animals.
21126834 - Reducing the examination interval to detect ovulation below 12h does not improve pregna...
8785474 - Use of cyclodextrin and its derivatives as carriers for oligonucleotide delivery.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Theriogenology     Volume:  41     ISSN:  0093-691X     ISO Abbreviation:  Theriogenology     Publication Date:  1994  
Date Detail:
Created Date:  2006-05-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0421510     Medline TA:  Theriogenology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1115-26     Citation Subset:  -    
Department of Veterinary Surgery, University of Bristol, Bristol BS18 7DU, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

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

Previous Document:  Comparison of reproductive performance in Belgian dairy and beef cattle.
Next Document:  Porcine oviductal cells support in vitro bovine embryo development.