👉 In obstetrics and gynecology, an ectoplacenta is a structure that forms in the uterus during pregnancy. It is an important part of the placenta, which is responsible for nourishing the developing fetus and transferring nutrients to it. The ectoplacenta is made up of two layers of tissue: the amniotic fluid (amnion) and the endometrium (uterine lining). The amnion is a protective layer that covers the fetus and protects it from