Liver flukes produce eggs in the biliary ducts of their hosts. These eggs make their way to the gull bladder, and when the gull bladder is emptied they go to the gut of their host. Then they are passively transported to the anus and expelled. One liver fluke can produce 25,000 eggs a day. The liver fluke is a parasitic flatworm. The life cycle of the liver fluke is: Sexually mature adults »» Fertilised eggs »» Miracidium (first larva) »» Sporocyst (second larva) »» Redia (third larva) »» Secondary Redia »» Cercaria (fourth larva) »» Encysted Cercaria »» Sexually immature adults. Like most Platyhelminthes the liver fluke is a hermaphrodite. The male consists of testes, vasa deferentia, seminal vesicle, ejaculatory duct, cirrus or penis, prostate glands and genital atrium. While the female consists of ovary, oviduct, uterus, vitelline glands, Mehlis’s glands and Laurer’s canal. Like all hermaphrodites they have the choice to produce sexually or asexually.