If the „soul” is an incarnate ghost, which at death is discarnated, then we do not receive such a ”soul” at conception, or at birth or any time later. If ”soul” means only the psychological activity, then animals also have soul. If ”soul” means life breath, then every living thing has soul, including the genital cells, even before combining to become an embryo. The human soul, in a psychological sense is a dynamic reality, since it develops to become a complete human psyche.
I didn’t find any Biblical evidence in behalf of an inherrent immortal soul. The notion of soul has no technical or scientific meaning in Scripture. According to every lexicon of Biblical languages, the „soul” has various, contextual meanings, such as: breath, life, being, person, self, affectivity, desire, etc. Nowhere it means „a ghost” or „a consciousness dwelling temporary in a human body”.
To my opinion, the pro-life mission must search for another basis than the „soul”, because the human being is ”like a mere breath”...”like a passing shadow” (Psalms 144:4 NAS). In death there is no kind of consciousness / soul (Psalms 115:17; Isaiah 38:18-19; Isaiah 63:16; Ecclesiastes 3:19-21; Ecclesiastes 9:4-6). From a Biblical perspective, we must refer to God’s commandment (”You shall not murder!” Exodus 20:13), to God’s Creation (Genesis 1:27; Genesis 9:6), to the wonder of maternity (NJB Psalms 139:16 ”Your eyes could see my embryo. In your book all my days were inscribed, every one that was fixed is there.”), and the legal seriousness of injuring a pregnant woman (Exodus 21:22-25). In addition, every human being is responsible to God regarding his or her own body, which is God’s temple (1 Corinthians 3:16-17; 1 Corinthians 6:19-20).
This is surely a religious matter. But I do not believe that it should be made a political one. It is wrong to commit suicide, but tell me, what punishment deserves someone who attempted suicide? My understanding is that abortion is more like a suicide (”assisted”!), like cutting your own fingers, your hand or taking out your own eye. It is a mutilation of your body and soul, and it is dangerous anyway. However, since that embryo / foetus, in any stage, is part of the woman’s body, as long as it is not yet born, aborting women should not be punished, since abortion is in itself a self-infliction, like suicide. At the same time, there are alternative solutions, like give in adoption the new born child, if the woman cannot rear it.