The term "partial birth infanticide" shall not under any cir stances be construed to include any of the following procedures: (i) the suction curettage abortion procedure, (ii) the suction aspiration abortion procedure, (iii) the dilation and evacuation abortion procedure involving dismemberment of the fetus prior to removal from the body of the mother, or (iv) completing delivery of a living human infant and severing the umbilical cord of any infant who has been completely delivered. For the purposes of this section, "human infant who has been born alive" means a product of human conception that has been completely or substantially expelled or extracted from its mother, regardless of the duration of pregnancy, which after such expulsion or extraction breathes or shows any other evidence of life such as beating of the heart, pulsation of the umbilical cord, or definite movement of voluntary muscles, whether or not the umbilical cord has been cut or the placenta is attached.
D. For purposes of this section, "substantially expelled or extracted from its mother" means, in the case of a headfirst presentation, the infant's entire head is outside the body of the mother, or, in the case of breech presentation, any part of the infant's trunk past the navel is outside the body of the mother.