With embryonic stem cell research, the embryos would most likely be manufactured in a lab. They wouldn't have progressed the stage of a fetus. Of course, it's not actually possible to make a baby in a lab, and the embryos would only last for...it's somewhere between 12 and 16 days, I think - it wouldn't actually grow into a baby, so again, I don't see what the big deal is about it. However, it's a moot point when you consider adult stem cell research.
