Since a one year old is capable of conscious interaction with individuals it recognizes, your theory fails. Most infants can respond to stimuli, and will smile and gurgle when they see their mother, in particular. In fact, almost all infants are clearly capable of displaying or vocalizing fear, hunger, discomfort and pain, so your premise is not only a shitty one, but it borders on sociopathy.
Then there's the fact that an EKG will demonstrate brain activity, which also negates your argument. If you want to try and use morally ambiguous statements to bolster a 'pro-life' position, please use ones that can't be so readily shot down.
It's not my place to dictate whether or not another human being can do something to their body, but if I was a prospective father, I would want to be involved in the decision making process, concerning an abortion. In the end, however, I'm not the pregnant party, so the final decision isn't mine.