Half of all Americans self-identify as "pro-life" while the other half self-identify as "pro-choice", and yet 2/3 of all Americans are opposed to abortion after the first trimester. Under Roe v. Wade, second trimester abortions are legal. So 2/3 of Americans, including those who self-identify as "pro-choice", are opposed to Roe v. Wade, though many of them may not even realize it.
I am pro-life, and a few years back I was attempting to prove the rate of abortions skyrocketed after Roe v. Wade. So I was walking into my research with a heavy bias, believing that before Roe v. Wade abortions were around 7 percent of what they were after Roe v. Wade.
Turns out I was WAY off.
Turns out there were nearly a million legal abortions a year before Roe v. Wade, and after Roe v. Wade the rate of abortions did not rise dramatically.
Here's why. While there were only a handful of states which allowed unrestricted abortions, most of the states which outlawed abortions permitted abortions for "the health of the mother" and for rape or incest.
So what happened is that doctors created a mile wide definition of "the health of the mother", and the end result was nearly a million abortions a year under the "health of the mother" rule.
I write all this to point out that when someone says they are against abortion except in cases of rape and incest and the "health of the mother", they should know that what they mean is not what ends up happening in practice.
This also means that overturning Roe v. Wade would probably have zero effect on the rate of abortion in America.