(a) A physician may terminate, assist in the termination of, or attempt the termination of a human pregnancy before viability.
(b) A physician may not terminate, attempt to terminate, or assist in the termination or attempt at termination of a human pregnancy otherwise than by birth after viability, unless, in the good faith medical judgment of the physician, the termination is necessary for the protection of the woman's life or health or in the event of a fetal anomaly for which there is not a reasonable likelihood of the fetus's sustained survival outside the uterus without extraordinary medical measures.