Stem cell research

I am researching "stem cell ". I came to his because of some information I receive from my biology class this semester. I don't really know much about this topic but some how it interest me. I really do want to know more about this issue, this is why I am doing it. I did some research on Pro quest and the rest on Google. It says that there are three different types of stem cell research; adult cell, cord cell, and embryonic cells ( which is the most controversial). The artificial that I have so far, highlights the need for stem cell research and gene therapy.