spiral artery

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spi·ral ar·ter·y

one of the corkscrewlike arteries in premenstrual or progestational endometrium.

spiral artery

The coiled terminal branch of a uterine artery. It supplies the superficial two thirds of the endometrium, and, in a pregnant uterus, it empties into intervillous spaces, supplying blood that bathes the chorionic villi at the placental site.

Synonym: coiled artery

See also: artery

References in periodicals archive ?

Ward, "Decidual spiral artery remodelling begins before cellular interaction with cytotrophoblasts," Placenta, vol.

Correlation between first and second trimester uterine artery Doppler velocimetry and placental bed histopathology

Cases may not be responsive to human albumin 25-50 g due to small placenta, edema of the villi, or spiral artery avulsion," said Dr.

Failed albumin Tx leads to C-section

The placental problem appears to be a relative failure of the uteroplacental circulation owing to spiral artery disease with consequent hypoxia, oxidative stress and diminished placental function.

Study on relation between placental laterality in second trimester ultrasound and development of preeclampsia at term