There isn't much of a record. Dan Gilgoff, Steve Waldman, and Rod Dreher speculate. Waldman:
[I]t's interesting that in the two cases we know of that related partly to abortion, she took the position that pro-life groups would have wanted (albeit for reasons unrelated to Roe v. Wade). At a minimum, these cases would seem to indicate that, if she is pro-choice, she didn't let those views affect her view of the relevant law.
2006-2011 archives for The Daily Dish, featuring Andrew Sullivan