Okay, so if it dies, then that means that a life was lost. A life was killed...
To get past semantics, I'm willing to drop the infant label, given that there are different names for different life stages of the child... I'll just refer to it as "a life", since (beginning with conception), the "life" is going through an approximately nine month long process of becoming a fully formed human being, such as you and I are today.
No matter what stage of life the child is aborted at (40 weeks, 20 weeks, 10 weeks, 2 days, etc...) It is still the loss of a life. Yes, sometimes that loss is natural. That is out of one's control (it is not immoral). However, when one forcibly kills that innocent unborn child, then it IS immoral. Whether someone is 10 years old, or 10 weeks old, they are still a life, all the same, and just as important all the same...