A man could go crazy worrying about stuff like this, but I was reading a brief history of the controversial Abortion pages on Wikipedia, and skimming the pages themselves, when I found this:
Should first-trimester abortions continue to be legal? In the United States, this is tantamount to asking, “Should Roe v. Wade continue to be supported?”
There is a widespread belief that if Roe were overturned, abortion would no longer be legal. Actually, that’s not true. Roe is a sufficient condition for legal first-trimester abortion not a necessary one.
If Roe were overturned today, first-trimester abortion would remain legal in every state where it was not explicitly prohibited by existing state law: which is to say, every state where it was legal in 1973, when Roe was decided. That’s New York, Alaska, Washington, Hawaii (repealed) and California (invalidated by state supreme court).
Any state whose legislature has bothered to legalize abortion while Roe was in effect (Why, since such a prohibition is a dead letter under Roe? Legislators do the darndest things.) would also continue to have legal abortion if Roe were dropped today. (I know of no state that fits into this category.)
Finally, some states would not enforce and would probably move to repeal the previously dead provisions of their state laws that outlawed abortion. Massachusetts is probably in this category; there would probably be others. But Roe is not the only thing keeping abortion legal in the U.S. — it’s just the only thing keeping abortion legal in Nebraska, or anywhere else it’s opposed by the majority of state residents.
Some useful data can be found in the infamous Levitt paper on abortion and crime rates.