Health: as I said previously, I will not pasken on life of death issues, certainly not on an online forum without knowing all the variables of a specific case.
Theoretically, it sounds likely that many Poskim would permit it if the doctors thought the pregnancy presents a real danger to the mother’s life. I don’t know in what circumstances Rav Elyashiv might permit this after 40 days.
Any case like this requires an experienced Posek who understands medical issues to communicate directly with the doctors to understand thintricacieses of the specific situation.