A mono-di (or mo-di) twin pregnancy is one where twins share a placenta and each have their own amniotic sac. Mono-di is short for monochorionic diamniotic, meaning one chorion, two amnions.

The baby’s side is covered with the amniotic membrane. In this type of placenta the chorion does not extend till the edges of the placenta. These may be Circumvallate where a small central ...

Evolution of the placenta Diagram of fetal membranes in a placental mammal: Abbreviations: C = chorion; V = yolk sac; Al = allantois; Am = amnion; E = embryo. Source: Adapted from an ...

You were once as wrapped as snug as the pony in the picture. Before you were born, you sat wrapped inside a placenta tucked inside your mother’s womb. That placenta was the very first ...

The chorion is a part of the afterbirth and is ... this implies that if each individual’s placenta is stored at birth instead of thrown away, these cells can be harvested in the future if ...

The chorion also makes up part of the placenta, and subchorionic bleeds often appear near the placenta. A subchorionic ...

This article is a review of the specific aspects of the fetal environment, including the cervix, uterus, placenta, chorion, amnion, amniotic fluid, and maternal aspects, and the potential meaning ...

The placenta seems to have evolved from the chorion, a thin membrane that lines the inside of eggshells and helps embryonic reptiles and birds draw oxygen. Kangaroos and other marsupials have and ...