President Barack Obama is expected to sign an executive order on Monday reversing restrictions on federal funding of embryonic stem cell research.
A senior administration official says the president will hold an event at the White House to announce the move. The official spoke on condition of anonymity because the policy had not yet been publicly announced on Friday.
Stem cells are the building blocks that turn into different kinds of tissue.
Under President George W. Bush, federal money for research on human embryonic stems cells was limited to those stem cell lines that were created before Aug. 9, 2001. No federal dollars could be used on research with cell lines from embryos destroyed from that point forward.