Chorionic vessels

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Vasculature of the placenta, with a chorionic artery labeled in .

Chorionic (plate) vessels are blood vessels, including both arteries and veins, that carry blood through the chorion in the feto-placental circulation.

Chorionic arteries branch off the umbilical artery, and supply the capillaries of the chorionic villi. Increased vasocontractility of chorionic arteries may contribute to preeclampsia.[1]