3 Parent Embroyos can prevent disease, but is it ethical?

It basically talks about how you can add another person's gene in a fertilized egg, but adding a new mitochondria. This technique is now being underattack because there are some ethical issues. Some issues that are brought up is that is the mitochondrial donor who donates their mitochondria a parent of the child they give the mitochondria to? Some say yes, while scientists say no, because you are not changing any physical attributes.

My question is the same the article gives out: Are the donors who donate their mitochondria the parent of the egg(child) they give it to?

Doing this ahead. Why not.

Neo Kim