https://stemcells.nih.gov/info/faqs.htm

Fetal stem cells are pluripotent. They can differentiate into any tissue meaning they are the masters of all cells and highly desirable. THIS is why they are after fetal stem cells vs. adult stem cells, which can be harvested from a living adult.

http://stemcell.childrenshospital.org/about-stem-cells/pluripotent-stem-cells-101/