You are arguing in favor of abortion when you say “your right to swing your fist ends where my nose begins” I can’t believe you don’t see that. The principle says that we are generally free, but we don’t have the right to harm or infringe upon someone else. But, that’s exactly what’s happening when a woman is forced to give from her body to support a child. You are giving the child the right to swing their fist wherever, regardless of who it harms.
The cells are a person from the very beginning. They are a person, and it is not wrong to abort them. It’s the most compassionate way to interpret our autonomy rights. The alternative is forced incubation.