In the majority of the amphibian species fecundation is external. This feature is common to bony fishes too and it shows that the reproductive system and the embryonic development of amphibians are a heritage from osteichthyes.
Curiously although having external fecundation amphibian male and female **** to stimulate the liberation of ***** and egg cells. This phenomenon does not characterize internal fecundation since the gametes unite in water.
