HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) All Versions of this Article: 72/3/755    most recent biolreprod.104.036384v1 Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Silva, L.A. Articles by Ginther, O.J. Search for Related Content PubMed PubMed Citation Articles by Silva, L.A. Articles by Ginther, O.J. Agricola Articles by Silva, L.A. Articles by Ginther, O.J.

Changes in Vascular Perfusion of the Endometrium in Association with Changes in Location of the Embryonic Vesicle in Mares¹

Eutheria Foundation, Cross Plains, Wisconsin 53528

The equine embryonic vesicle is mobile on Days 12–14 (Day 0 = ovulation), when it is approximately 9–15 mm in diameter. Movement from one uterine horn to another occurs, on average, approximately 0.5 times per hour. Mobility ceases (fixation) on Days 15–17. Transrectal color Doppler ultrasonography was used to study the relationship of embryo mobility (experiment 1) and fixation (experiment 2) to endometrial vascular perfusion. In experiment 1, mares were bred and examined daily from Day 1 to Day 16 and were assigned, retrospectively, to a group in which an embryo was detected (pregnant mares; n = 16) or not detected (n = 8) by Day 12. Endometrial vascularity (scored 1–4, for none to maximal, respectively) did not differ on Days 1–8 between groups or between the sides with and without the corpus luteum. Endometrial vascularity scores were higher (P < 0.05) on Days 12–16 in both horns of pregnant mares compared to mares with no embryo. In pregnant mares, the scores increased (P < 0.05) between Day 10 and Day 12 in the horn with the embryo and were higher (P < 0.05) than scores in the opposite horn on Days 12–15. In experiment 2, 14 pregnant mares were examined from Day 13 to 6 days after fixation. Endometrial vascularity scores and number of colored pixels per cross-section of endometrium were greater (P < 0.05) in the endometrium surrounding the fixed vesicle than in the middle portion of the horn of fixation. Results supported the hypothesis that transient changes in endometrial vascular perfusion accompany the embryonic vesicle as the vesicle changes location during embryo mobility.

¹ Supported by the Eutheria Foundation (Cross Plains, WI), Projects P1-LS-03 and P2-LS-03.

² Correspondence: O.J. Ginther, Animal Health and Biomedical Sciences, 1656 Linden Drive, University of Wisconsin, Madison, WI 53706. FAX: 608 262 7420; ginther{at}svm.vetmed.wisc.edu

This article has been cited by other articles:

				J C Ferreira, E L Gastal, and O J Ginther Uterine blood flow and perfusion in mares with uterine cysts: effect of the size of the cystic area and age Reproduction, April 1, 2008; 135(4): 541 - 550. [Abstract] [Full Text] [PDF]

				L.A. Silva and O.J. Ginther An Early Endometrial Vascular Indicator of Completed Orientation of the Embryo and the Role of Dorsal Endometrial Encroachment in Mares Biol Reprod, February 1, 2006; 74(2): 337 - 343. [Abstract] [Full Text] [PDF]