The Decidual (falling off) shell


The decidual envelope (the falling shell) is the membrane formed from the cells of the stroma of the uterine mucous membrane during pregnancy and falling off after childbirth (it is excreted from the uterus cavity together with the lochia). The decidual membrane consists of large light cells containing glycogen, the so-called decidual cells. The decidual membrane facilitates the attachment of a fertilized egg in the uterus and the proper development of the fetus. Glycogen of the decidua serves to feed the egg in the early stage of development of the fetal egg.