It's a logical and pertinent question, but not a single one of the demonstrators had a well-thought-out answer. Most of them initially suggested that the woman would have to answer to God, but then later displayed some discomfort when the interviewer pointed out that if abortion were simply a matter between a woman and God, then there was no reason to make it illegal.
Fascinating responses in the comments, not all of them predictable. Although Suzanne takes a characteristic hard-line with:
Personally, I think *eventually* women will have to answer for the killing of the unborn child. Maybe not in the beginning, because the first goal is just to have it illegal. Period. But as the population becomes more cognizant of the fact that unborn children are equal human beings, eventually, women will pay a penalty, as there will be no excuse for abortion. Note, though that before the advent of legal abortion, women were excused from prosecution by agreeing to testify against the abortionist.
Just to clarify: I am pro-choice, don't think its murder, and etc.