It's surprisingly simple: create and legislate instances where the mother must abort the baby.
Another way to do this is "If the father doesn't want it, the mother must abort." This completely up-ends the stance where the mother has the choice to abort even if the father wants the child and has no way to cause the mother to carry to birth/term.
I guarantee you'll see all those pro-choice folks backtracking and wanting "common sense" abortion legislation.
For the record, I used to be pro-none-of-my-business because everyone else's life is not mine. Then states passed "abort at any time for any reason" laws which completely threw the only thing I agreed with out the window: Viability.
And I'm not just talking about New York. There are, what, 6, 7 states now that allow this.
When abortion becomes forced, they'll want to do a whole bunch of changing to do something that has become completely degenerate baby killing. Which is the point I'm making: it will force the conversation to be had again.
What you're describing is not pro choice though. The entire point of the argument is people should be able to choose whether to abort or not because they either don't feel that the child is a living thing at the point of abortion, or think the choice to give birth to it and everything that comes along with that is more important than the right of the child to be born.