After it bends around the superior mesenteric artery, it is called the "midgut loop".

It comprises the portion of the alimentary canal from the end of the foregut at the opening of the bile duct to the hindgut, about two-thirds of the way through the transverse colon.

The midgut loops slip back out of the umbilical cord and the physiological hernia ceases to exist.

This change coincides with the termination of the yolk sac and the counterclockwise rotation of the two limbs of the midgut loop around their combined central axis.

As stated, in development a loop of midgut herniates outside of the abdominal cavity into the umbilical cord.