When you recognize that a fetus is or will become in a short period of time a living person, and all living people have rights, being pro-life is VERY libertarian.
I see things this way, that baby or soon-to-be-baby (we can argue when life begins or when that fertilized egg becomes human, but no matter when “life begins”, its only a 9-month interval between sex and a birth certificate) has rights, and has done NOTHING wrong.
Of course my personal views end at the politics, as prohibitions ALWAYS end badly. You can’t eliminate ANYTHING, you just change who controls it. You ban abortion and you trade Planned Parenthood for a Doctor moonlighting at the veterinary clinic, or a junkie with a clothes hanger. Since so many pregnancies self-terminate, I see an abortion ban as a net killing of healthy mothers. That ain’t pro-life in my book.