I'm curious, would pro-lifers be ok with this compromise?
According to that poll:
A total of 56% of respondents expressed belief that abortion should be mostly
or completely illegal in all cases, while 43% expressed support for partially or
completely banning it.
The answer to your question would be, it depends on who you ask.
Most pro-life advocates are okay with abortion in certain situations even beyond 3 months, such as when carrying to full term or birth puts the mother's life at risk.
Also, rape and incest are justifications most pro-lifers cite as reasonable for abortion if done soon enough, such as 1st trimester. One of the main reasons rape victims are offered an "abortion pill" is so they are unlikely to have to make that choice and suffer the procedure.
Given what some states have been offering as new laws banning abortion after a heartbeat is present, I'd say the majority of pro-life advocates are okay with 1st trimester as a reasonable compromise. At least then the argument that "it's just a clump of cells" is more supported than it would be in the 9th month.
Until science and the laws agree on a definition for when human life begins, this issue will never be settled. Until we get that definitive answer, there are going to be those that take advantage and demand abortions without restrictions, and those who demand we err on the side of human rights and ban unnecessary abortions.