Decidua Basalis. The decidua basalis is the innermost portion of the layer which rests directly under the embryo. Of the decidua, the decidua basalis is the most important, as the vessels in this part of The villous trophoblast (from the fetus) and the decidua basalis (from the mother), and the intervillous spaces.
Decidua capsularis: decidua that grows over the blastocyst after implantation, appearing as a cap-like structure.
The decidua vera becomes the remaining portion of the uterine lining,and sheds as the lochias.
The maternal portion is known as the decidua basalis. The two portions are held together by anchoring villi that are anchored to the decidua basalis by the cytotrophoblastic shell. Meaning of decidua basalis medical term.






