Gen. 2:7 tells us that Adam did not become a "living soul" until he took he first breath. Certainly, the fetus contains all the Potential for life, but it is not breathing on its own yet in the womb...
Adam is the Prototypical pattern for all human life, and the human bodies of our entire race are based on him and contain the same raw materials [dust to dust]. It is also thru his blood that sin was communicated to all mankind, [Acts 17:25] and as Romans 5:14 tells us below; The second Adam [Jesus Christ] is of the same figure or "type"-[tupos] as the first Adam, so any attempt to separate us from Adam is unwise unless you want to question the perfection of the body of Christ in the same breath.
Rom. 5:14 Nevertheless death reigned from Adam to Moses, even over them that had not sinned after the similitude of Adam's transgression, who is the figure [tupos] of him that was to come. [Christ]
The Big difference between the First and Second Adams is their blood, Adam's was sinful-Christ's was perfect. The realization of how it is perfect however provides great insight into our redemption. Since Christ was the product of the perfect sperm God created in Mary, his Blood was not stained with Adam's sin, which is a main reason why Christ can qualify as the perfect sacrifice for the sin of Mankind. No other human was ever conceived in this manner, which puts Christ in a class by himself, matching Adam's stature prior to his fall in Eden. We find more of this in Hebrews 2;
14 For as much then as the children are partakers of flesh and blood, he [Jesus] also himself likewise took part of the same; that through death he might destroy him that had the power of death, that is, the devil; 15 And deliver them who through fear of death were all their lifetime subject to bondage. 16 For verily he took not on him the nature of angels; but he took on him the seed of Abraham. 17 Wherefore in all things it behooved him to be made like unto his brethren, that he might be a merciful and faithful high priest in things pertaining to God, to make reconciliation for the sins of the people.
Hebrews tells us all other members of humanity are partakers of flesh and blood, but Jesus only took part of the same! He was a man of the flesh, "made like unto his brethren" but not of Adam's Blood! Evidence from the medical profession supports this because it shows that the blood comes from the male side which was carried in the perfect sperm God created in Mary. If this was not the case then Jesus died for nothing and all mankind remains un-redeemed! But we serve a Perfect Heavenly Father and we can see the perfect wisdom in His plan of redemption for Mankind, embodied in His only begotten Son Jesus Christ!
Since Adam did not become a "living soul" until he took he first breath, and he is the pattern for the physical life of all humanity, then it sets the standard for when life as a "living soul" begins. When God was forming Adam out of the ground he displayed all the "potential for life' that any fetus does, but he was not yet an autonomous life form because he was not breathing under his own power. So it is with the fetus who parasitically breathes off the host mother in the womb, until the newborn takes its first breath at birth.
Why else does the same verse [Gen. 2:7] I'm referencing contain the words "breath of Life"? Because God as the Source of all LIFE, is the One Who breathed it into Adam, which is also acknowledged in [Job 33:4].
This is a perfect link to [Levi 17:11] where the life of the flesh is in the Blood, because the blood carries the oxygen of the breath of life to all the cells of the human body. Anyone familiar with grade school biology knows this, and its just another piece of the puzzle that fits into God's ultimate plan of Redemption. This is not "my version" of the case but a clear depiction of the Scriptural record, with a view of the bigger medical picture included. Don't mess with God's Plan...