A little research on that would show that legitimate therapeutic procedures not directed against the baby, are not abortion in any sense, even if the situation is desperate and death of the baby is foreseeable.
It's always a matter of aggressively attacking the disease condition, not the baby. In ethics, this is called "Double Effect". Click that, it's THE starting place for ethical clarity on this issue.
Lest this seem too complicated, let me give examples of procedures of this kind:
Hysterectomy in a case of uterine cancer in a pregnant woman. Again, the surgery focuses on the removal of the uterus, not the murder of the baby. If it were possible to remove the uterus AND surgically remove the baby as in premature delivery, this would be morally required.
Drug/radiation/chemotherapy for a cancerous pregnant woman. This is always legitimate to save her life, whether or not it (indirectly) risks the baby.
Premature delivery of baby when mother has a potentially terminal condition like acute pulmonary hypertension with right heart failure during pregnancy. This is legitimate if there is a good-faith attempt to save the baby. Even if the baby is too preterm to survive, the baby must be handled respectfully and treated as what she is --- a dying baby --- and not just dismembered as would be done in abortion.
I have done considerable reading and questioning about this over a period of 30+ years, and I have never heard of a case where an actual attack on the child, i.e. an abortion, was necessary to save a mother's life.
An experienced OB/Gyn (mine) once told me that "abortion to save the mother's life" is never necessary and, when done, would indicate that the doctor was either unwilling or unable to practice modern obstetrics.
Interestingly, the country with the lowest maternal mortality rate in the world (Ireland) is also one of the few countries where the laws against criminal abortion are enforced.
So before you go polling people about this, it would be best to start by defining your terms correctly.
I would be as interested in the results as you are.
Nicely stated