Uterine Implantation Due to Enzymatic Digestion of the Endometrium Is

Question

Uterine implantation due to enzymatic digestion of the endometrium is initiated by the
A) inner cell mass.
B) endoderm.
C) chorion.
D) mesoderm.
E) trophoblast.

Accepted Answer

Uterine implantation is initiated by the trophoblast, which secretes enzymes that digest the endometrium, allowing the blastocyst to implant in the endometrial lining of the uterus. The inner cell mass, endoderm, chorion, and mesoderm are not directly involved in the process of implantation.