amnionic fold

am·ni·on·ic fold

a fold of the amnion enclosing the yolk stalk and extending from the point of insertion of the umbilical cord to the yolk sac; in reptiles and birds it is the reflected edge of the amnion where it folds over to cover the embryo during early development.
Synonym(s): Schultze fold
Farlex Partner Medical Dictionary © Farlex 2012
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