Falling Shell

The decidua is the inner lining of the uterus that forms during pregnancy. It consists of a modified endometrium and plays an important role in embryo implantation and development.

At the beginning of pregnancy, proliferation and decidualization of endometrial cells occurs. The endometrium thickens and turns into a shedding membrane. It fills the entire uterine cavity and is adjacent to the growing embryo.

The falling shell performs several functions:

1. Provides implantation and nutrition of the embryo in the early stages of development.

2. Produces hormones and growth factors necessary to maintain pregnancy.

3. Creates an immunological barrier between the mother's body and the embryo, protecting it from the mother's immune system.

4. Participates in the formation of the placenta.

After childbirth, most of the shedding membrane is separated from the wall of the uterus during the postpartum cleansing of the uterine cavity. Therefore, it is often called “falling away”. However, a small part of the membrane remains as a basal layer and serves as the basis for endometrial regeneration.

Thus, the shedding membrane plays a key role in the development and gestation of pregnancy. Its violations can lead to problems with implantation, miscarriages and other complications.

Shell falling off

_The sheath is the protective membrane of the fetus._ It protects the fetus from the adverse effects of internal and external factors. The main task of the falling membrane is to provide free access to the surface of the fetus for enzymes and substances in the maternal plasma that contribute to the growth and development of the fetus. During the evolution of the human body, the sheath developed until it became almost completely permeable, which allows the fetus to freely receive all the substances and metabolic products it needs. If the fetus is deprived of this shell, it dies