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 ?
Cartwright, "Cellular and molecular regulation of spiral artery remodelling: lessons from the cardiovascular field," Placenta, vol.
Cartwright, "Trophoblast-mediated spiral artery remodelling: A role for apoptosis," Journal of Anatomy, vol.
The etiology of the disease is still unknown, although research suggests that the trophoblast is unable to effectively invade the decidua or to modify the spiral artery walls (3).
The endovascular trophoblasts are vital to these changes that occur in both the segments of spiral artery that lie in decidua and myometrium.
(2) In one large study chorangiosis occurred in 3% of 1614 deliveries and was associated with placental lesions including infarcts, chronic villitis, fetal artery thrombi, and spiral artery thrombi.