Why are some people against stem cell research?

- Its potential human life so it shouldn't be used for experiments. - Scientists should focus on finding more stem cells so people don't need to rely on embryos. - Its banned in some countries but in the UK it has strict guidelines. - Curing patients is more important than the rights of embryos. - The embryos are unwanted ones from fertility clinics which would have been destroyed if they weren't used for research.