Explore one or more ethical issues raised by the use of stem cells in medical re

Explore one or more ethical issues raised by the use of stem cells in medical research and/or in treatments for medical conditions. Under what circumstances if any do you think stem cells should be used? Explain your reasoning.
I don’t have a specific view point on this so you write it in any view points you want. I need three sources but you can put in more if needed. I need to get one of the work sited off the first 2 pdf that I entered in. It doesn’t matter which one I just need to to use an example from one of them. The other work sited have to be from two scholarly sources. A website that you can you to find this work sited is https://plato.stanford.edu/