umbilical artery


Also found in: Dictionary, Thesaurus, Legal, Acronyms, Encyclopedia, Wikipedia.
Related to umbilical artery: middle cerebral artery

um·bil·i·cal ar·ter·y

[TA]
before birth this artery is a continuation of the internal iliac; after birth it is obliterated between the bladder and umbilicus, forming the medial umbilical ligament, the remaining portion, between the internal iliac artery and bladder, being reduced in size and giving off the superior vesical arteries.
Synonym(s): arteria umbilicalis [TA]

umbilical artery

the first branch of the anterior trunk of the internal iliac artery and the origin of the superior vesical artery. In the fetus, the umbilical artery is large and carries blood from the fetus to the placenta. After birth, the vessel closes distally to the origin of the superior vesical artery and eventually becomes a solid fibrous cord, the medial umbilical ligament.

um·bil·i·cal ar·te·ry

(ŭm-bil'i-kăl ahr'tĕr-ē) [TA]
Before birth, a continuation of the internal iliac; after birth it is obliterated between the bladder and umbilicus, forming the medial umbilical ligament, the remaining portion, between the internal iliac artery and bladder, being reduced in size and giving off the superior vesical arteries.
Synonym(s): arteria umbilicalis [TA] .

umbilical artery

In the embryo, either of a pair of arteries that originate in the embryonic aortas (the dorsal aortas) and that carry blood from the embryo to the yolk sac and the chorion. In the adult, the lumen of the umbilical arteries disappears and the arteries become fibrous cords, called the medial umbilical ligaments, along the inner surface of the abdominal wall.
See also: artery
References in periodicals archive ?
As fetal oxygenation may change rapidly in cases of chorioamnionitis, it is unlikely that umbilical artery FVWs in these cases could have given sufficient warning that the fetus was at risk.
The present study was based on gross morphological parameters in umbilical cord with normal and single umbilical artery cases and various umbilical cord anomalies present in them.
Whereas, isolated umbilical artery abnormality was more associated with adverse perinatal outcomes (72%).
Placental histopathological correlates of umbilical artery Doppler velocimetry in pregnancies complicated by fetal growth restriction.
Conclusion: Abnormal umbilical artery Doppler is a better predictor of neonatal outcome in terms of APGAR score, Birth weight, NICU admission and probability of still births than normal Doppler study.
Women with severe IUGR with placental insufficiency as diagnosed by umbilical artery Doppler were included in the study (n = 18).
Results: No significant difference was found between the two groups for the fetal age, maternal weight gain (kilogram), estimated fetal weight gain (EFWG), fetal BPP, AFI, and umbilical artery S/D ratio.
The human umbilical artery is a paired artery which transports deoxygenated blood from the fetus back to the placenta.
The blood was drawn separately from the umbilical artery and vein using
Loss of some layers of the elastic fibers observed at this stage probably prepares the umbilical artery and veins for closure at birth.
Decreased absent or reversed end diastolic flow in umbilical artery suggestive of increased fetoplacental resistance.