A human fetus is NOT a parasite. A forming human is NOT a parasite. That is a living thing that will be capable of complex thought and reasoning. Just because somebody wasn't careful and didn't use protection does not give them the right to kill off one of their own kind. The woman decided to have s*x and there are consequences to her actions. If she really doesn't want the child, she could put it up for adoption once it is born. Of course in extreme cases such as r*pe or severe genetic mutation in the baby, abortion can be justified. However, if the reason is just "I don't want it", then no. Abortion is wrong.