In my time following the abortion debate, I've never found a logical and acceptable answer as to why the woman should get off scott free. The usual answer is that the woman is somehow also a victim and should be treated as such, but of course, we don't apply this logic to a thief who steals because he's poor, or a murderer who killed because he was raised by an abusive father. Every criminal can be said to be a victim in some sense.
"The usual answer is that the woman is somehow also a victim and should be treated as such"
Rather an insulting conclusion, when you think about it; the woman was too infantile/stupid/passive/whatever to know what she was doing. Poor dear.
The fact is that most everyone knows someone who has had an abortion (whether they're aware of who it is or not), and they have a tough time picturing someone as normal as their sister, cousin, secretary, or dental hygienist locked away in the slammer.