I think it should be legal, everyone should have the choice. I think I'm the only pro life person who believes in the freedom to choose but so be it. If I was put in a position where my child would grow up in pain or their life would be impacted severely by something I would want to be able to choose which way to go, and it would probably kill me to choose to abort but if it was the right thing to do then I would do it.
I'm unsure on the cutoffs...the 20 week thing is too soon, by that point you have so little time to decide, it's right around the time when you get an ultrasound for the heart and other organs and lots of women discover their babies have awful heart problems that would have their children on ventilators or worse. That gives you like 4 days to decide when the doctor is all said and done if you can get in in a timely manner...
So I think it should be a suggested thing, not enforced. More like a moral guideline.
Check this article out:
https://www.scarymommy.com/why-a-20-week-abortion-ban-is-scary-for-all-women/