I'm no doctor but, it's an Embryo until 8-10 weeks. It only becomes a fetus after that. That fetus still cannot function on its own until week 21 at the earliest. And in most cases, if born then, it dies. 24ish weeks you could technically consider it a person with a very slim chance of surviving outside the womb.
Besides all that stuff, I consider this more important;
- Chances of child being born with medical conditions such as malformations, chromosomal abnormalities.
- Mother's life at risk.
I think it should be legal.