As used in this subchapter:
(1) “Abortion” means the intentional termination of the pregnancy of a mother with an intention other than to increase the probability of a live birth or to remove a dead or dying fetus;
(2) “Physician” means any person licensed to practice medicine in this state; and
(3) “Viability” means the state of fetal development when, in the judgment of the physician based on the particular facts of the case before him or her and in light of the most advanced medical technology and information available to him or her, there is a reasonable likelihood of sustained survival of the unborn child outside the body of the mother, with or without artificial life support.