A California company has announced that it can obtain ethically non-controversial stem cells from the placenta. Celgene Corporation has developed a technology which isolates pluripotent cells. They can then be used for repairing damaged or diseased tissue. “Human embryos were once thought to be the only source of stem cells that could give rise to all types of tissue, but several studies have shown that stem cells derived from the placenta following birth may have similar regenerative properties,” says a company press release. Celgene’s latest research has not been published in a peer-reviewed journal.