During its formation, the decidua has several distinct parts, named based on the location of each part in relation to the embryo. The decidua basalis is the portion of the decidua that is related to the chorion and participates with it in the formation of the placenta, becoming the maternal component of the fully formed placenta. The decidua capsularis is the portion of the decidua that overlies the embryo, while the rest of the decidual tissue is parietal decidua.
Embedded in the decidua are the maternal endometrial veins and arteries.
|Definition||Specialized endometrium that forms during pregnancy|
|Function||Participates in the formation of placenta and protects the embryo.|
Learn everything about the changes in pregnancy with the following study unit:
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