This paper presents a study of embryonic development, larval and post-larval (metamorphosis) of the frogs of the species Rana dalmatina F. (agile frog) under laboratory conditions. This species has a shrinking population and is declared strictly protected species. Egg collection was made in one of the breeding ponds Gadinti the commune, Neamt County, March 2014. Study, conducted with low material brings valuable data about the conditions of their embryonic, larval and post-larval and possibility of increasing laboratory frogs important aspects for understanding and conserving this species of amphibians.