spiral artery


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spi·ral ar·ter·y

one of the corkscrewlike arteries in premenstrual or progestational endometrium.

spiral artery

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.
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.
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.