Biogenetic Law

The biogenetic law states that during development, an individual's embryonic stages repeat the evolutionary history of its ancestors. This is known as ontogeny recapitulates phylogeny. Biogenetic law posits that the embryonic stages in the development of an individual, its ontogeny, repeat the evolutionary history of its ancestors, its phylogeny. This is commonly summarized as ontogeny recapitulates phylogeny.