CAMBRIDGE, Mass., Dec. 17 (UPI) -- Leading U.S. medical researchers say the cloning of human embryos is still their best hope for developing effective treatments for diseases.

WASHINGTON, Jan. 7 (UPI) -- U.S. researchers say a cell found in amniotic fluid of pregnant women has many of the same traits as embryonic stem cells, the Washington Post reported.

WASHINGTON, May 3 (UPI) -- Some of the human embryonic stem-cell lines approved for federally funded research may not meet newly recommended ethical criteria for conducting that research -- a conflict that could limit access to the cell lines even further and impede progress in the

WASHINGTON, March 3 (UPI) -- Scientists said Wednesday they have created 17 new lines of human embryonic stem cells, an advance that doubles the number of lines available to researchers and could trigger a review of President Bush's policy on the cells.

WASHINGTON, Feb. 12 (UPI) -- Scientists said Thursday that for the first time they successfully have used cloning to create human embryonic stem cells, an advance that could spur progress in the field of regenerative medicine as well as renewed debate over whether cloning should be b

WASHINGTON, Aug. 15 (UPI) -- Although the recent claim by Chinese scientists that they created a cloned human embryo using rabbit cells made headlines around the world, cloning experts have many reasons to doubt the assertion.

CAMBRIDGE, Mass., March 20 (UPI) -- Scientists said Thursday that they have devised a way of predicting genetic mutations in cancer patients that confer resistance to anti-cancer drugs.

BOSTON, Sept. 11 (UPI) -- Scientists have discovered there is no single gene that gives a stem cell the ability to transform into different cell types in the body, but rather it is a com

WORCESTER, Mass., Jan. 31 (UPI) -- Researchers said Thursday that they have created a renewable line of stem cells using unfertilized egg cells from a monkey.