For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
Ferdinand Gunn
In him was life and that life was the light of men. Once conception takes place it's associated with the creative work of God which consist of the body, soul and spirit as per Heb 4:12 - For the word of God is living and powerful, and sharper than any two-edged sword, piercing even to the division of soul and spirit and joints and marrows (body).........