After 24 months you can not have an abortion, the fetus is viable. Only of you were seriously ill would they deliver the baby early and try to save it. The limit is 20 weeks but not all states allow it, just first trimester.
Not in general. If it's for the mother's health you can have it up to 24 weeks. After that they have a chance to save the baby if it's born. If you are this far along you should speak to Planned...