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Frog embryos
This is what a human embryo looks like six weeks after conception
Inside a Ginkgo seed is an embryo, with the beginnings of leaves and a stem.

An embryo is the earliest stage in the development of a fertilised egg (the zygote). It is the term used for any animal or plant, from the first cell division until birth, or hatching, or germination in plants.

In humans, it is called an embryo until about eight weeks after fertilization, and from then until birth it is called a foetus (US: fetus).

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