Not to mention tubal pregnancies.
Again, inevitable death vs induced death is the critical distinction. A baby who is implanted in the fallopian tube is no less a baby than one who is implanted in the womb. Though the baby has virtually no chance of survival, and his or her mother will not be able to carry him or her beyond a certain point, there remains a difference between intentional killing and death of the child as a tragic and unpreventable circumstance. There is no choice but to remove the part of the fallopian tube that contains the child, who, sadly, will not survive, but it is essential to note that the child will not be harmed deliberately or directly. The baby's life span is virtually the same as it would have been, had his or her part of the fallopian tube remained; the difference is that the mother's life will be removed from danger. The principle of double-effect is visible here.