[exDemMom]

After implantation nearly 1/3 of pregnancies end in miscarriage. So clearly, implantation is a critical step. Without it and the nutrition it brings the fetus cannot sustain life. God is a god of reason. It is reasonable to believe that a fetus becomes a living soul some time after implantation. Particularly given the importance of being born, baptized, etc. per the Scriptures.

I would go so far as to say that a god who would pop a soul into every product of conception, given that 90% of them are incapable of growing to become a baby, is a cruel god. I do not believe that God is cruel, or that He would inflict unnecessary suffering in that manner. I believe that the soul appears at the same time the brain starts to function, sometime between 3 and 5 weeks post-conception.