The early conceptus can spontaneously abort if it doesn't implant into the uterine wall and develop a uteroplacental circulation.Which vessels of the embryo directly contribute to this essential circulation?

Question

Quizplus · Accepted Answer

The allantoic arteries and veins are responsible for the formation of the allantois, which helps to establish the uteroplacental circulation. This allows for exchange of nutrients and waste between the developing embryo/fetus and the maternal blood supply. The other vessel options listed do not directly contribute to this essential circulation.

The Early Conceptus Can Spontaneously Abort If It Doesn't Implant