Document Detail

Transrectal Doppler sonography of uterine and umbilical blood flow during pregnancy in mares.
MedLine Citation:
PMID:  14662147     Owner:  NLM     Status:  MEDLINE    
Transrectal color Doppler sonography was used to investigate uterine and umbilical blood flow during pregnancy (duration, 46-48 weeks) in four mares. The resistance index (RI) and blood flow volume (VOL) of the uterine arteries ipsilateral and contralateral to the conceptus, and the presence of an early diastolic notch in the Doppler wave, were evaluated every 4 week throughout pregnancy. Fetal blood flow was calculated semiquantitatively every 2 week (from 20 to 40 weeks), using the RI of the umbilical arteries. During the entire period of investigation, there were no significant individual variations in uterine RI and VOL nor differences between the two uterine arteries. Mean RI decreased by more than half during pregnancy from 0.89 +/- 0.01 to 0.39 +/- 0.03, and mean VOL increased almost 400-fold from 69 +/- 37 to 27,467 +/- 8851 ml/min. There were relationships (P<0.0001) between week of pregnancy (x) and RI as well as VOL. These were described by the equations RI=0.938-0.150 ln(x) and VOL (ml/min)=7.621x(2.157). Log transformed total estrogen (TE) were related to RI (r=-0.879; P<0.05) as well as to VOL (r=0.888; P<0.05). The notch in the Doppler wave of the uterine artery disappeared between 18 and 26 weeks. There was a correlation (P<0.0001) between week of gestation (x) and RI values of the umbilical arteries; this was described by the equation RI=1.763-0.071x+0.001x2. Further studies are needed to determine whether transrectal color Doppler sonography could be used to identify mares at risk of abortion.
Heinrich Bollwein; Frank Weber; Ina Woschée; Rudolf Stolla
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Theriogenology     Volume:  61     ISSN:  0093-691X     ISO Abbreviation:  Theriogenology     Publication Date:  2004 Jan 
Date Detail:
Created Date:  2003-12-09     Completed Date:  2004-03-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0421510     Medline TA:  Theriogenology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  499-509     Citation Subset:  IM    
Department of Animal Reproduction, Veterinary College, University of Munich, Königinstr 12, 80539 Munich, Germany.
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MeSH Terms
Arteries / ultrasonography
Blood Flow Velocity
Gestational Age
Horses / physiology*
Reference Values
Regression Analysis
Ultrasonography, Doppler, Color / veterinary*
Umbilical Arteries / ultrasonography*
Uterus / blood supply*
Vascular Resistance

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

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