I think this is proof enough folks ! This is taken from the article above.
Some might question how that Jesus could be born of God and born of Mary without having His blood tainted by the blood of Mary.
But remember, we get our blood from our father, not our mother!
Again in Dr. M.R. DeHaan’s book The Chemistry of the Blood, I quote from page 31: “It is unnecessary that a single drop of blood be given to the developing embryo in the womb of the mother. Such is the case according to scientists. The mother provides the foetus (the unborn developing infant) with nutritive elements for the building of that little body in the secret of her womb, but all the blood which forms in it is formed by the embryo itself. From the time of conception to the time of birth of the infant not ONE SINGLE DROP OF BLOOD ever passes from mother to child. The placenta, that mass of temporary tissue known better as ‘afterbirth,’ forming the link between mother and child, is so constructed that although all the soluble nutritive elements such as proteins, fats, carbohydrates, salts, minerals and even antibodies pass freely from mother to child and the waste products of the child’s metabolism are passed back to the mother’s circulation, no actual interchange of a single drop of blood ever occurs normally. All the blood which is in that child is produced within the child itself. The mother contributes no blood at all.”