One of the first documents patients sign when starting in vitro fertilization asks them to consider the very end of their treatment: What would they like to do with extra embryos, if they have any?

The U.A.B. system said it was worried about potential criminal prosecutions after Alabama’s Supreme Court ruled that frozen embryos should be considered children. By Anna Betts The University of ...

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 ...