During early embryonic development in mammals, the totipotency of the zygote — which is reprogrammed from the differentiated gametes — transitions to pluripotency by the blastocyst stage, coincident ...

The investigation of the developmental patterns can be dated back to the very beginnings of classical embryology. Aristotle, one of the first naturalists to systematically observe animal development, ...

For several years, researchers studied human embryonic stem cells (ESCs) to understand the unique features of these pluripotent cells, but on their own, they poorly resembled the complex structures ...