I have to disagree with you diamondsz. Garbage becomes the property of whomever wants it the moment it leaves your curb. These fetuses are discarded so I don't think consent should be required.
I think it would be foolish not to use the stem cells from these aborted fetuses. It only makes sense to make the most of a situation.
As for the pro-life groups, I can only imagine that people fear that science and technology will enable some type of artificial womb or something that will allow doctors/ scientists unlimited fetuses for experimentation and to harvest stems cells. I can only guess it's something that bizarre because the idea that using these stem cells will increase the number of abortions is crazy! I don't know of any woman who is willing to end a pregnancy just so a stranger can have the stem cells. The few times that anything like this has happened (when a child had a serious disease and could benefit from stem cells), the women actually gave birth to and raised the child.