Mouse blastocyst at the pluripotent stage, when cells have the capacity to generate all of the cell types of the adult

The ‘ultimate’ stem cell

29 October 2014

In the earliest moments of a mammal’s life, the developing ball of cells formed shortly after fertilisation ‘does as mother says’ – it follows a course that has been pre-programmed in the egg by the mother. Extraordinary as this is, what happens then is even more remarkable.

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