Because because with what you are saying, she should be able to do it. Maybe she just got sued and doesn't have the money to support a baby, and unexpentatly went into labor. What if a boyfriend who had a good amount of money left her, and she went into labor?
I don't wish to control other people, however I think it is wrong for a woman to have an abortion since it is killing another human. I don't have a problem with people doing what they want to themself as long as it doesn't hurt somebody else.