Technological, ethical and legal issues have limited the understanding of the early stages of embryonic development in humans, despite its importance in basic developmental biology and reproductive ...

Welcome to Lab Dish, a First Opinion column on regenerative medicine from Paul Knoepfler. Twenty years ago, the use of human embryonic stem cells in research was among the most fiercely debated topics ...

Lab-grown structures with the potential to develop into fetuses should be defined — and regulated — as embryos, some researchers say. It is time for a redefinition of the human embryo, a team of ...