define Surrogate: A woman who carries an embryo that was formed from the egg of another woman; or She is not related in any way to the baby inside her.
Catholics will reject that Mary was a surrogate mother as we all know because if it were true then they could not practice witch craft. For they believe in necromancy. (Praying to a dead woman)
Now from scripture I see that Mary IS NOT the biological mother of Jesus. Her sinful blood never touched that of Jesus and her sinful nature/seed/egg was never used to create Jesus. Mary was a Surrogate Mother.
Rom 1:3 Concerning his Son Jesus Christ our Lord, which was made of the seed of David according to the flesh;
This is a good verse because it makes it clear that according to the flesh or the fact that Jesus was born of man in the "FORM" of sinful flesh means you can trace back his Mother (Lk 3) and Father (Mat 1) to David in the flesh.
Now the question you must ask yourself: Is Jesus fully God or did his genetic make up get entangled with sinful man?
The promises were spoken to Abraham and to his seed. The Scripture does not say "and to seeds," meaning many people, but "and to your seed," meaning one person, who is Christ
Is this seed Spiritual or Physical?
If you belong to Christ, then you are Abraham's seed, and heirs according to the promise.
For you have been born again, not of perishable seed, but of imperishable, No one who is born of God will continue to sin, because God's seed remains in him.
Jesus was not born of the physical seed or blood line of Abrahams seed but of the Spiritual seed which is Christ. For He is the Holy Spirit in the flesh. The Father of creation who became a man.
So it is written: "The first man Adam became a living being" ; the last Adam, a life-giving spirit.