Scientists at a technology company said Sunday they have created human embryos through cloning, drawing criticism from President Bush and lawmakers and raising new ethical questions. Advanced Cell ...

However, gastrulation, the period beyond this cutoff, represents when the embryo begins to form the eventual body plan, making it an interesting stage to understand early organogenesis. “We’ve just ...

From a single cell to an entire organism, embryonic development is a process of continuous and constant change. However, our ...

“I was always interested in how cells decide their fate,” Zernicka-Goetz said. In the mouse developing embryo, she previously demonstrated a bias at the two-cell stage: one cell contributed more to ...

So, Haeckel proposed, by examining the development of an embryo you could read its entire evolutionary history in the transition from one stage to another. In fact, this isn't strictly true ...

The annual migration of Christmas Island's red crabs—where millions of creatures cover its beaches as they make their way ...

The zygotic genome remains transcriptionally silent in the early stage; then the early embryo undergoes profound changes in its genomic architecture and reprograms the chromatin from a germ cell ...