Debate exists around the creation, treatment or destruction of human embryos in the use of stem cells for genetic research. Adult stem cells can be obtained without harm to the individual, but
In 2009, FDA approved the 1st human clinical trials using embryonic cells.
Background info: http://en.wikipedia.org/wiki/Stem_cell_controversy
These are some databases to use to start brainstorming or researching about a topic. They will give you an overview of a research topic and some ideas of ways that you can pursue the topic in more detail.