Actually, for Catholics, the answer is flat out “no.”
The baby has just as much of a right to life as the mother does, and is innocent.
Direct abortion, even to save the life of the mother, is
never permitted. However, as in the case of an ectopic pregnancy where the baby is developing in the fallopian tube and, if the situation is allowed to continue, both the mother and the child will die, the Church does permit the
tube to be removed, which
indirectly causes the baby to die. This is not the same as a direct abortion, so it is not fobidden absolutely, but the rest of the criteria must be fulfilled (for example, the intent must not be for the child’s death, and the proportionality of the situation must be such that BOTH the mother and the child will die)
This is called the “Doctrine of Double Effect” and has been one of the primary philosophical motivators of the Church’s teachings on morality for hundreds of years. More information on the Doctrine of Double Effect can be found at
uno.edu/~asoble/pages/dde.htm
You may also wish to go look over on EWTN’s Q&A boards, search the answers for double effect and you should come up with multiple responses.
+veritas+