Although I am pro choice, I can see the argument from both sides.
Making abortion illegal will absolutely drive it underground and force women to have illegal abortions. So, illegal abortions - definitely something to be avoided.
But then the flip side of that is that unprotected sex feels less risky, because of the availability of abortion. Hence - more abortions.
The thing that has always puzzled me is that it is quite easy not to get pregnant, at least in the west. (obviously, I'm not talking about rape, etc).
Even if you have not used contraception, for whatever reason, there is always the morning after pill.
I have managed to have regular sex for decades and not get pregnant when I didn't want to.
And of course, contraception fails. I just wonder whether the number of abortions correlates to failed contraception.
I haven't drilled down into the statistics and the arguments on both sides, so I could be completely off here. Apologies if I am.