Just a thought to ponder: Do the Assemblymen believe a fetus is a life? If so, how does rape justify the taking of a life? If not, then it is my opinion that we have no right to restrict abortions. I've never understood that concession by the pro-life community.
The reason for the exception is that it means making the woman carry the pregnancy in a case where she didn't consent to the act that made her pregnant in the first place. That does not make the abortion justified in a moral sense, but it does give a sense of the law being particularly burdensome. For someone who respects human life but also has a high regard for liberty, it can be a difficult issue.