Even if we assume a fetus is a person from the first second, that *still* doesn't mean the state could or should prevent abortions.

Pregnancy is difficult, dangerous, and has various side effects, some of them permanent. The state doesn't have the right to make people go through that. No one has the right to impose that or similar burdens on someone else.

I'm very skeptical we want to give the state that right. If I need part of your liver, are you good with the State forcing you to give it to me? No? But I'm a person with the right to live and the burden imposed on you would be probably be less than going through pregnancy.