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 Cardenas, H.
Right arrow Articles by Pope, W. F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Cardenas, H.
Right arrow Articles by Pope, W. F.

Journal of Animal Science, Vol 75, Issue 1 202-207, Copyright © 1997 by American Society of Animal Science

JOURNAL ARTICLE

Administration of testosterone from day 13 of the estrous cycle to estrus increased the number of corpora lutea and conceptus survival in gilts

H. Cardenas and W. F. Pope
Department of Animal Sciences, Ohio State University, Columbus 43210, USA.

The effects of exogenous androgens on the number of corporea lutea (CL) and conceptus survival were examined in crossbred gilts. In Exp. 1, gilts received 1 mg of testosterone per day from d 13 (d = 0 first day of estrus, n = 21) or d 16 until estrus (n = 23). Gilts in the vehicle group received corn oil (n = 20). Gilts were mated and on d 11.5 their concepti and CL were evaluated. In Exp. 2, conceptus survival was examined at the 4- to 8-cell, early blastocyst or hatching blastocyst stages for gilts given vehicle or 1 mg testosterone from d 13 (24 gilts per group). In Exp. 3, gilts received 1 mg of androstenedione (n = 20) or vehicle (n = 18) per day from 13 d to estrus and then were mated and evaluated on d 11.5. Results from Exp. 1 indicated that the number of CL was greater (P < .04) in gilts treated with testosterone from d 13 to estrus than in gilts receiving vehicle (16.4 vs 14.8, respectively). Similarly, the number (P < .01) and recovery rate (P < .04) of blastocysts were greater in gilts treated with testosterone from d 13 to estrus than in gilts treated with testosterone from d 16 to estrus in gilts receiving vehicle (number, 15.3 vs 12.8 or 12.8; recovery rate, 95 vs 87 or 86%, respectively). Gilts treated testosterone or vehicle did not exhibit differences (P > .05) in number of normal concepti at the 4- to 8-cell and hatching stages. However, prior treatment with testosterone delayed conceptus death; gilts treated with testosterone had more (P < .01) normal concepti at the intermediate stage (early blastocyst) than those treated with vehicle (treatment x embryo stage interaction, P < .05). In Exp. 3, androstenedione treatment did not influence (P > .10) the number of CL or the number and recovery rates of d-11.5 blastocysts. Treating gilts with testosterone from d 13 of the estrous cycle to the following estrus increased the number of CL and blastocyst survival, perhaps by improving some, as yet unknown, aspect(s) of oocyte quality.


This article has been cited by other articles:


Home page
 Biol. Reprod.Home page
E. Jimenez, H. Cardenas, and W. F. Pope
Effects of Androgens on Serum Concentrations of Gonadotropins and Ovarian Steroids in Gilts
Biol Reprod, December 1, 2008; 79(6): 1148 - 1152.
[Abstract] [Full Text] [PDF]

Home page
 Biol. Reprod.Home page
C.J. Corbin, F.M. Moran, J.D. Vidal, J.J. Ford, T. Wise, S.M. Mapes, V.C. Njar, A.M. Brodie, and A.J. Conley
Biochemical Assessment of Limits to Estrogen Synthesis in Porcine Follicles
Biol Reprod, August 1, 2003; 69(2): 390 - 397.
[Abstract] [Full Text] [PDF]


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