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Human embryo compared to other animals
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Human embryo compared to other animals

This picture shows the early stages of vertebrate embryos to their formation with the common characteristics of each specie.

As one can see in the first row, at the beginning they are almost identical, and change eventually as pregnancy progresses. This is the reason why some say human embryos are like fish or chicken embryos.

By BSc, MSc (embryologist), BSc, MSc (embryologist) and BA, MA (fertility counselor).
Last Update: 02/02/2017