If all things were the same, but it was men who fell pregnant and gave birth, abortion clinics would be so standard they’d be on every corner, like McDonald’s. In fact, it’d be a sign of status to go to one.
Male 1: “I’m just off to the abortion clinic real quick.”
Male 2: “Oh nice, King. You’ve been busy.”
Male 1 leaves.
Male 3: “He’s so cool.”
Assuming a ~20% shift towards pro-choice opinions I would expect more pro-choice laws, not an orgy of casual abortions.