Bonus Answer

         One of the medical advances of modern science today is what we know as the ‘surrogate mother.’ When a man and his wife learn that the wife is unable to carry a child to full-term, they will have their doctor extract sperm and egg cells from them. He then fertilizes the egg cell in the laboratory using the sperm of the husband and then implants the fertilized egg into the womb of another woman where it will be nourished and will grow. When the embryo reaches full-term, this woman then gives birth to the child and turns this child over to the parents. Although this woman has carried this child in her womb for nine months and has given birth to it, the child does not possess any of her genes just those of the parents who donated the sperm and egg cells. This knowledge helps us to understand how Jehovah brought about the 'birth of Jesus' in David’s lineage. Jesus’ life force, in embryo form, was implanted in Mary’s womb where it grew to full-term and she gave birth to him. He did not inherit any of her genes so he could be born perfect.

First off we have to recognize, the baby's genes and DNA DO NOT, I repeat do not come from circulating blood, but are imprints in the cell, both egg cell and sperm cell.

Also I checked a source written by a physician to see whether the mother's blood passed through the placenta to the embryo and learned that it does not. So the baby develops with a separate circulatory system separate from the mother who carries the baby. All of this shows how a "surrogate" mother doesn't actually contribute anything to the actual formation of the baby, DNA wise, blood wise or any other way, thus making the "surrogate" mother just an temporary incubator of sorts, carrying the baby till birth.

The book is Your Pregnancy, week by week, by Dr. Glade B. Curtis, OB/GYN and Judith Scheeler, MS, 5th edition, page 110.

They write that "circulation is separate (fetal blood does not mix with your (mother's) blood."

There are many other sources that can be checked if you disagree with this statement.

Interesting, Psalms 139:16 speaks of Jesus' miraculous formation as being in the "embryo" state. Of course, all of this would occur in the womb of Mary (and not within the fallopian tube as would be in conception where sperm and egg unite). No but instead the actual starting point of Jesus' existence on earth as a human was actually in the EMBRYO STATE, where he would be placed in the womb of Mary. Meaning, Jehovah simply implanted the "embryo" of Jesus in Mary simply making her a "surrogate" mother only in his sight. Accordingly, Mary contributed no DNA, blood or anything else to the formation of this perfect baby.