Author: Glossary
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Double placenta
A placental mass of the two placentae of a twin gestation.
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Discoid placenta
A placenta that constitutes practically one circumscribed and circular mass.
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Deciduate placenta
A placenta of which the maternal part escapes with delivery.
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Cordiform placenta
A placenta having a marginal indentation, giving it a heart shape.
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Cirsoid placenta
A placenta with appearance of varicose veins.
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Placenta circumvallata
A placenta whose membranes wrap over the edge of the fetal surface of the organ.
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Chorioallantoic placenta
A placenta in which the allantoic mesoderm and vessels fuse with the inner face of the serosa to form the chorion.
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Bipartite placenta
A placenta divided into two separate parts.
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Bilobate placenta
A placenta consisting of two lobes.
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Bidiscoidal placenta
A placenta with two separate portions attached to separate sites on the wall of the uterus, occasionally found in humans.