McCorvey came out against abortion years ago, but her decision to actively challenge the landmark ruling was spurred, she explained, by new technology that dramatically increases chances for viability for the unborn.

She also cited the increase in post-abortion depression among women.

McCorvey's lawyer, Allan Parker, explained the legal process, telling "Hannity & Colmes": "Under Rule 60, Norma, as a party [to the original case], can ask the court to vacate her judgment – set it aside as if it never was – on the grounds that it's no longer just."

Parker said he would be required to show that both medical and legal conditions had changed significantly since the court decided Roe vs. Wade 32 years ago.

Editor's note: