Question

the site of implantation for a fertilized egg or the layer that sheds during menstruation if no egg is fertilized is called... oocyte puerperium endometrium

Explanation:

The endometrium is the inner - lining of the uterus. It is the site where a fertilized egg implants. If no egg is fertilized, the endometrial layer is shed during menstruation. An oocyte is an immature egg cell, and the puerperium is the period after child - birth.

Answer:

endometrium