The egg can be released from the body, this canal can also serve as a way to expel excess stored sperm. Life cycles
Trematodes have a very complex life cycle and depending on what taxa they belong to, their life cycles can be completed with as little as one host compared to the typical three hosts. When there is one host, this is normally a specific species of snail of the family Lymnaeidae. Almost all trematodes infect molluscs as the first host in the life cycle, and most have a complex life cycle involving other hosts. Most trematodes are monoecious and alternately reproduce sexually and asexually. The two main exceptions to this are the Aspidogastrea, which have no asexual reproduction, and the schistosomes, which are dioecious. In the definitive host, in which sexual reproduction occurs, eggs are commonly shed along with host feces. Eggs shed in water release free-swimming larval forms (Miracidia) that are infective to the intermediate host, in which asexual reproduction occurs. A species that exemplifies the remarkable life history of the trematodes is the bird fluke, Leucochloridium paradoxum. The definitive hosts, in which the parasite reproduces, are various woodland birds, while the hosts in which the parasite multiplies (intermediate host) are various species of snail. The adult parasite in the birds gut produces eggs and these eventually end up on the ground in the birds feces. Some eggs may be swallowed by a snail and hatch into larvae (miracidia). These larvae grow and take on a sac-like appearance.
Aldara may refer to:

Former name of Alvanq, a community or municipality in Armenia
Àldara, Sardinian name of Ardara, Sardinia, a comune or municipality
Imiquimod or Aldara, a prescription medication that acts as an immune response modifier

See also
Aldara Park, Gauteng, a suburb of Johannesburg, South Africa