Implantation of an embryo occurs in the

A) cervix.
B) perimetrium.
C) myometrium.
D) endometrium.
E) ampulla.

Endometrium

The inner lining of the uterus, which thickens during the menstrual cycle in preparation for implantation of a fertilized egg or is shed during menstruation if no pregnancy occurs.

Embryo Implantation

The process by which a fertilized egg attaches itself to the lining of the uterus to begin pregnancy.

Perimetrium

The outermost layer of the uterus, part of the serous membrane that covers the exterior of the uterus.