Between 6 and 10 Days After Conception,the Trophoblast Secretes Enzymes

Between 6 and 10 days after conception,the trophoblast secretes enzymes that enable it to burrow into the endometrium until the entire blastocyst is covered.This is termed implantation.Tiny projections then develop out of the trophoblast and extend into the endometrium.These projections are referred to as

A) Decidua basalis
B) Decidua capsularis
C) Decidua vera
D) Chorionic villi

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