Endometrium vs. Decidua

Endometriumnoun

(anatomy) The mucous membrane that lines the uterus in mammals and in which fertilized eggs are implanted.

Deciduanoun

(anatomy) A mucous membrane that lines the uterus and is shed during menstruation and modified during pregnancy

Endometriumnoun

The membrane lining the inner surface of the uterus, or womb.

Deciduanoun

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

Endometriumnoun

(pregnancy) the mucous membrane that lines the uterus; thickens under hormonal control and (if pregnancy does not occur) is shed in menstruation; if pregnancy occurs it is shed along with the placenta at parturition

Deciduanoun

the epithelial tissue of the endometrium

Endometrium

The endometrium is the inner epithelial layer, along with its mucous membrane, of the mammalian uterus. It has a basal layer and a functional layer; the functional layer thickens and then is shed during menstruation in humans and some other mammals, including apes, Old World monkeys, some species of bat, the elephant shrew and the Cairo spiny mouse.

Decidua

The decidua is the modified mucosal lining of the uterus (that is, modified endometrium) that forms in preparation for pregnancy. It is formed in a process called decidualization under the influence of progesterone.