Structural Organization of Arterial Vessels in Placental Hypoplasia.

Structure of the placental arterial bed was studied using histological and morphometric methods. The formation of smooth muscle regulatory complexes in blood vessels of the chorionic plate and chorionic villi was demonstrated. These complexes are genetically determined and represent a variant of compensatory and adaptive reorganization of the placental arteries for adequate fetoplacental blood supply under normal conditions and placental underdevelopment.