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An animal foetus in the earliest stages of development - in humans, in the first eight weeks after fertilisation.
An animal foetus in the earliest stages of development; in humans, in the first eight weeks after fertilisation. From the very first cell division, the foetus will grow to around 2.5 centimetres after eight weeks, and by the end of this developmental stage will have begun to form eyes and other internal organs, and become capable of some movement.
From the very first cell division, the foetus will grow to around 2.5 centimetres after eight weeks, and by the end of this developmental stage will have begun to form eyes and other internal organs, and become capable of some movement.