Von Baer, in 1828, put forwarded Von Baer’s law. It was later called the biogenetic law by Ernst Haeckel in 1866. It states that an animal in its individual development from egg to adult repeats or recapitulates in a condensed form the stages through which its ancestors have passed in the course of their evolution. This statement can be briefly put in three words - ontogeny repeats phylogeny.