placenta circumvallata placenta cir·cum·val·la·ta (sûr’kəm-və-lā’tə)
A cup-shaped placenta having raised edges and a thick, white, opaque ring around its periphery.
- Placenta fenestrata
placenta fenestrata placenta fen·es·tra·ta (fěn’ĭ-strā’tə) n. A placenta in which there are areas of thinning, sometimes involving the lack of placental tissue in some areas.
- Placenta increta
placenta increta placenta in·cre·ta (ĭn-krē’tə) n. Placenta accreta in which chorionic villi invade the myometrium.
[pluh-sen-tuh] /pləˈsɛn tə/ noun, plural placentas, placentae [pluh-sen-tee] /pləˈsɛn ti/ (Show IPA) 1. Anatomy, Zoology. the organ in most mammals, formed in the lining of the uterus by the union of the uterine mucous membrane with the membranes of the fetus, that provides for the nourishment of the fetus and the elimination of its waste […]
- Placental barrier
placental barrier n. The semipermeable layer of tissue in the placenta that serves as a selective membrane to substances passing from maternal to fetal blood.