Digenean life stage juvenile fluke 2016-04-27T12:56:49Z jl16 worm_development WBls:0000719 A Digenean (fluke) life stage that occurs in the definitive host. The stage begins when the newly excysted juveniles migrate through the liver parenchyma where they increase in size to become juvenile flukes. From here they migrate into the bile ducts, where they grow and develop into fully mature adults.