Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1993-10-7
pubmed:abstractText
A cross-sectional transvaginal color and pulsed Doppler study was performed on 95 normal singleton pregnancies to establish blood flow characteristics of maternal and placental components of circulation. During the pregnancy, vascular impedance to blood flow decreases from the main uterine artery to the spiral arteries in the maternal component of uteroplacental circulation. In the placental component of circulation, vascular impedance decreases from the umbilical artery to the fetal arteries within placenta-intraplacental arterioles. At the same time, in both components of uteroplacental circulation, an increase of blood flow velocity with gestational aging was observed. There was no significant drop of vascular impedance of blood flow or increase of blood flow velocity around the 12th or 14th gestational week, which should prove the hypothesis of 'opening' of spiral arteries which have tips plugged with trophoblast tissue.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0301-2115
pubmed:author
pubmed:issnType
Print
pubmed:volume
49
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
29-32
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Transvaginal color Doppler in the assessment of placental blood flow.
pubmed:affiliation
Ultrasonic Institute Medical School University of Zagreb, Croatia.
pubmed:publicationType
Journal Article