If I were pregnant (and presumably had a uterus) I would probably be more likely to seek an abortion knowing that there is now a greater chance I would die giving birth then before.
Before: ok every pregnancy is risky as well as birth there is a small but possible chance things could go badly for me but medical science will do what is required for me to survive including ending the pregnancy even at the last second.
Now: if I need an abortion later I won’t be able to get one and will die. I better go to a state where it is legal and get it done now.