The inner layer of the wall of the uterus, which envelops the embryo, forms a part of the placenta, and is discharged with it.

The mucus lining of the uterus that's passed after childbirth or during the menstrual period.

part of endometrium reacting to implantation; later consisting of basal, capsular and parietal regions.

Differentiated endometrium of pregnancy which is shed (like a deciduous tree sheds its leaves) at childbirth or miscarriage, as part of the afterbirth. During pregnancy it has important hormonal functions (see decidual cells).