I think the one thing you can say for certain about all ethical issues is that they are not simple!
Issues like this never really split into dualities: this is right, that is wrong; this is x, that is not x; etc. If you think about them deeply enough, applying reason & science & equal fairness to all parties, (and trying to avoid emotion & pre-digested thinking) most of these things are naturally complicated and difficult to resolve.
But of course for practical purposes we have to draw lines somewhere. (Examples: At what age does a child become an adult? At what point could a bunch of cells be considered an embryo or foetus?) We hope for the wisest decision. It will never be perfect. Some parties will always feel aggrieved. I'm glad I don't have to decide, merely ponder.