Basically a textbook reason for having abortion services available for all...
Or just... education?
Why not both?
Desperate people are going to do desperate things, things that they know are bad or won't work. Especially if the only option that does work is taken away.
"Don't try to flush out your vagina with potassium permanganate" is...very specific education. And horrific folk remedies like this show up all the time where abortion isn't legalized - "educating" would be a game of whack-a-mole.