J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Burns, P. D.
Right arrow Articles by Henricks, D. M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Burns, P. D.
Right arrow Articles by Henricks, D. M.

Journal of Animal Science, Vol 75, Issue 4 1078-1086, Copyright © 1997 by American Society of Animal Science

JOURNAL ARTICLE

Effect of dietary energy restriction on follicular development and luteal function in nonlactating beef cows

P. D. Burns, J. C. Spitzer and D. M. Henricks
Animal, Dairy, and Veterinary Sciences Department, Clemson University, SC 29634-0361, USA.

Twenty nonlactating beef cows were used to determine the effects of dietary energy restriction on ovarian follicular and corpus luteum (CL) development. Cows were fed to either gain (controls) or lose (restricted; RES) body weight. Observations continued until RES cows developed a subfunctional CL (progesterone [P4] < 1.5 ng/mL on d 10 of a cycle; n = 4) or had functional CL (P4 > or = 1.5 ng/mL on d 10 of a cycle; n = 6) followed by anestrus, at which time observations were discontinued on individual controls. Estrous cycles were then standardized for all cows. For RES cows developing subfunctional CL, cycle A was the cycle before development of the subfunctional CL, and cycle B was the 11-d period during development of a subfunctional CL. For RES cows with a functional CL, cycle A was the next to last cycle before anestrus, and cycle B was the 11-d period during formation of a functional CL. Daily P4 concentrations did not differ (P > .10) between controls or RES cows developing functional CL during cycle B but were lower (P < .05) in RES cows developing subfunctional CL. Ovulatory follicles and CL were smaller (P < .05) in RES cows during cycles A and B compared with controls. Daily IGF-l concentrations were higher on d 2 through 4 of both cycles in RES cows developing functional CL compared with RES cows developing subfunctional CL (P < .05). Feeding diets limited in energy resulted in two types of CL. These differences may have been due to IGF-I concentrations.


This article has been cited by other articles:


Home page
 Vet PatholHome page
H. L. Higdon III, P. G. Parnell, J. E. Hill, and J. C. Spitzer
Streptozocin-induced Pancreatic Islet Destruction in Beef Cows
Vet. Pathol., November 1, 2001; 38(6): 715 - 720.
[Abstract] [Full Text] [PDF]

Home page
 Biol. Reprod.Home page
J. Mao, B. K. Treacy, F. R.C.L. Almeida, S. Novak, W. T. Dixon, and G. R. Foxcroft
Feed Restriction and Insulin Treatment Affect Subsequent Luteal Function in the Immediate Postovulatory Period in Pigs: Progesterone Production In Vitro and Messenger Ribonucleic Acid Expression for Key Steroidogenic Enzymes
Biol Reprod, January 1, 2001; 64(1): 359 - 367.
[Abstract] [Full Text]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1997 by the American Society of Animal Science.