Is it unethical to research embryos?

As the subject says, Is it unethical to conduct research on embryos? Why or why not?



My opinion:
[spoiler]I think that it is not, because they have a chance at not surviving in the first place, especially if it were an IVF baby. At the same time we are protecting embryos, we are letting people get killed in war and in the military. How does that make any sense?[/spoiler]