Jesus is one person with two natures. Mary is the mother of Jesus, who was both true man and true God. Mary did not give birth to a nature, but to a person. Mary is the mother of Jesus. Rather than mother of God, you might as well say she's the mother of man. It makes as much sense.
Since God is triune, He exists in 3 persons. To call Mary the mother of God seems wrong. She is the mother of the son of God. She did not birth the father. She did not birth the holy spirit. I realize this term was from the early 200's, but it still sits wrong.
So Mary is the mother of God, as in the son of God. Mary is not the mother of God, as in the triune God.
Excellent reply! Thanks!
This has already been addressed to formerfetus in my post #17. You are restating a 5th century heresy.