A US court on Monday ordered a temporary halt to federal funding of embryonic stem cell research, which President Barack Obama had authorized, saying it involved the destruction of human embryos.
US District Court Judge Royce Lamberth ruled in favor of a coalition of groups, including several Christian organizations, which had sought a temporary injunction on funding of the research ahead of a planned lawsuit.
"Plaintiffs have demonstrated a strong likelihood of success on the merits," Lamberth said.
The coalition argues that President Obama's March 2009 lifting of a ban on federal funding for embryonic stem cell research violates legislation that prohibits government funding for research in which embryos are discarded or destroyed.
"ESC (embryonic stem cell) research is clearly research in which an embryo is destroyed," Lamberth's ruling said.
"To conduct ESC research, ESCs must be derived from an embryo. The process of deriving ESCs from an embryo results in the destruction of the embryo. Thus ESC research necessarily depends upon the destruction of a human embryo."
Obama's decision to reverse the ban on federal funds for ESC research was lauded by many researchers who believe the field has huge potential for treating serious diseases including Alzheimer's, Parkinson's and diabetes.
Researchers believe that stem cells, so-called because they are the foundation for all human cells, provide two promising avenues for scientists.
First, they can be used for research that cannot be performed inside the body. But scientists believe they can also coax the foundational cells into cardiac, pancreatic or brain cells to replace damaged or infected cells and allow tissue or organs to reconstitute themselves.