Complex sentence: The most common caul type (portion of the amniotic sac), which more frequently clings to the head and face of the infant, on rarer occasions it drapes over the head and partly down the torso of the child.
Split into simpler sentences: The most common caul type, or portion of the amniotic sac, clings to the head and face of the infant. On rarer occasions it drapes over the head and partly down the torso of the child.