"Deliberately we have always used the expression 'direct attempt on the life of an innocent person,' 'direct killing.' Because if, for example, the saving of the life of the future mother, independently of her pregnant condition, should urgently require a surgical act or other therapeutic treatment which would have as an accessory consequence, in no way desired or intended, but inevitable, the death of the fetus, such an act could no longer be called a direct attempt on an innocent life. Under these conditions the operation can be lawful, like other similar medical interventions granted always that a good of high worth is concerned, such as life, and that it is not possible to postpone the operation until after the birth of the child, nor to have recourse to other efficacious remedies."