Here's an interesting phenomenon, similar to men who have sex with men and moralize against homosexuality, or second ladies to anti-gay presidents who write lesbian themed literature: anti-choice women who get abortions. This article's a bit old, but it adds to this conversation:
Many anti-choice women are convinced that their need for abortion is unique -- not like those "other" women -- even though they have abortions for the same sorts of reasons. Anti-choice women often expect special treatment from clinic staff. Some demand an abortion immediately, wanting to skip important preliminaries such as taking a history or waiting for blood test results. Frequently, anti-abortion women will refuse counseling (such women are generally turned away or referred to an outside counselor because counseling at clinics is mandatory). Some women insist on sneaking in the back door and hiding in a room away from other patients. Others refuse to sit in the waiting room with women they call "sluts" and "trash." Or if they do, they get angry when other patients in the waiting room talk or laugh, because it proves to them that women get abortions casually, for "convenience".
A few behave in a very hostile manner, such as calling clinic staff "murderers." Years ago, a clinic counselor in British Columbia told me that one of her patients went into the procedure room apparently fine with her decision to have an abortion. During the abortion, at a stage when it was too late to stop the procedure, the woman started screaming "You murderers!" and other invectives at everyone in the room.
Follow the link - there are lots of interesting stories there about this phenomenon. It's almost like they can understand the need, they can understand many women's reality, but they can't bring themselves to question their beliefs....