A lot of women will have no regrets whatsoever about terminating a pregnancy, especially when it's done very early. I know a couple of women who had abortions when they were young, and later married and had children. They don't regret it. They know the only reason they're able to provide a decent life for the children they did have was because they didn't screw up their lives and education and finances by having a baby when they were in no position to raise it decently. Some women do have regrets, but it's hardly a given.
I seriously doubt there are many women who have regrets about having aborted a pregnancy that was caused by rape or incest, or would have any trouble telling their daughters about it. Most mothers would prefer that their daughters not have to live with the fear that the horror of a rape could then be followed by 9 months of the horror of being forced to carry the rapist's baby to term.