decidua

Examples of decidua in the following topics:

• Chorionic Villi and Placental Development

  • These villi invade and destroy the uterine decidua while at the same time they absorb nutritive materials from it to support the growth of the embryo .
  • The placenta functions as a fetomaternal organ with two components: the fetal placenta (chorion frondosum), which develops from the same blastocyst that forms the fetus; and the maternal placenta (decidua basalis), which develops from the maternal uterine tissue.

• Development of the Extraembryonic Coelom

  • Villi emerge from the chorion, which invade the endometrium, destroy the uterine decidua, and allow the transfer of nutrients from maternal blood to fetal blood.

• Fourth Week of Development

  • The chorionic villi, which invade and destroy the uterine decidua and at the same time absorb from it nutritive materials for the growth of the embryo.

• Anatomical Changes

  • After implantation, the uterine endometrium is called the decidua.
  • The placenta, which is partly formed from the decidua and partly from outer layers of the embryo, connects the developing embryo to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood supply.

• Uterine (Menstrual) Cycle

  • If a blastocyst implants, then the lining remains as the decidua.

• Trophoblast Development

  • A blastocyst embedded in the uterine decidua.

• Premature Infants

  • The presence of this glycoprotein in the cervical or vaginal secretions indicates that the border between the chorion and deciduas has been disrupted.