it's murder but in SOME cases it can be correct though (like your example)
I'm supposed to be Catholic, so I know why they reject (well, everyone knows this actually):
Moses gave us the ten commandments, and for Christians it's very important to follow them, because they give you the right to get in Heaven.
The third commandment is (well, don't know the exact English translation): Thou shall not kill
And like I said, abortion is murder, and therefor they don't do that
(I remember that example you gave, it was one of the main raisons they changed the abortion law in Belgium)
There are other examples of religions things that turns out to be wrong (for the person that is involved or the opinion of the others)