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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
2-3
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pubmed:dateCreated |
1990-6-13
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pubmed:abstractText |
The systolic/diastolic ratios (A/B) of uteroplacental blood flow velocity waveforms as related to the placenta location were investigated by continuous-wave Doppler ultrasound in 67 normal pregnancies at 18-21 weeks, in 111 at 31-33 weeks, and in 34 at 40-41 weeks of gestation. Using real-time ultrasound, the placenta was located laterally in 48%, posteriorly in 30% and anteriorly in 22% of the pregnancies. A/B values decreased slightly with advancing gestational age. With lateral placenta location, statistically significant higher A/B values were found in vessels on the nonplacental side at 31-33 weeks of gestation (2.07 +/- 0.43 versus 1.74 +/- 0.27; p less than 0.05). In the other gestational age groups there were no statistically significant differences between A/B values in the vessels on the placental and nonplacental sides. There were also no differences in A/B values between left and right uteroplacental vessels with anterior or posterior placenta locations in any of the gestational age groups.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:status |
MEDLINE
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pubmed:issn |
0301-2115
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
35
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
139-45
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:2335247-Blood Flow Velocity,
pubmed-meshheading:2335247-Female,
pubmed-meshheading:2335247-Humans,
pubmed-meshheading:2335247-Placenta,
pubmed-meshheading:2335247-Pregnancy,
pubmed-meshheading:2335247-Pregnancy Trimester, Second,
pubmed-meshheading:2335247-Pregnancy Trimester, Third,
pubmed-meshheading:2335247-Uterus
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pubmed:articleTitle |
Uteroplacental blood flow velocity waveforms in the second and third trimesters of normal pregnancy as related to the placenta location.
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pubmed:affiliation |
Department of Obstetrics, University Hospital of Zurich, Switzerland.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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