Editing Digenea (section)

====Female organs====
Usually there is a single [[ovary]] with an [[oviduct]], a [[semen|seminal receptacle]], a pair of vitelline glands (involved in [[yolk]] and egg-shell production) with ducts, the ootype (a chamber where eggs are formed), a complex collection of glands cells called ''Mehlis’ gland'', which is believed to lubricate the uterus for egg passage.

In addition, some digeneans possess a canal called [[Laurer's Canal]], which leads from the oviduct to the dorsal surface of the body.  The function of this canal is debated, but it may be used for insemination in some species or for disposal of waste products from reproduction in other species.
Most trematodes possess an ovicapt, an enlarged portion of the oviduct where it joins the ovary. It probably controls the release of ova and spaces out their descent down the uterus.

The uterus typically opens into a common genital atrium that also received the distal male copulatory organ (cirrus) before immediately opening onto the outer surface of the worm.  The distal part of the uterus may be expanded into a metraterm, set off from the proximal uterus by a muscular sphincter, or  it may be lined with spines, as in the [[Monorchiidae]] and some other families.