Sounds like a “don’t know when life begins” argument.
So, if you don’t know when life begins,
you expose a lot of your morality by where you choose to err.
I can state without hesitation that life is present when the heart begins to beat. Beyond that, I cannot find a legitimate biblical argument for making the killing of the fetus a "murder". It may be in the eyes of God, but I am not going to speak for God on that point. God does make it clear that if there is blood flowing, then there is "life".
you expose a lot of your morality by where you choose to err.
Tell me about me. What have I exposed?