Afterbirth
The vesicle can be seen in the afterbirth as a small, somewhat oval-shaped body, the diameter of which varies from 1 mm to 5 mm. It is situated between the amnion and the chorion and may lie on or at a varying distance from the placenta.
Sometimes a narrowing of the lumen of the ileum is seen opposite the site of attachment of the duct.
Read more about this topic: Vitelline Duct