This is a valid argument. Who is more likely to be a criminal, an unwanted child, who grows up in a violent, drug using, promiscuous home, born to a single, uneducated and unprepared mother; OR a child who is wanted and can be raised by responsible parents?
Simply look at the statistics of who has more abortions, then look at the environment these unwanted children would be growing up in. To remove emotion from the equation, you simply pay a little for an abortion up front, or pay a lot later to prosecute the criminal later(plus the untold number of victims who have been killed, maimed or robbed).
If babies are adopted into nice middle class families, they have a very good chance of doing well in life. I know quite a few people who were given up for adoption and are now wonderful parents themselves.