After the death experience has been completed, then the Soul is made ready to be born again.
When a couple is engaged in sexual union, a whirlpool of energy (a vortex) is created above them. This energy attracts Souls who are awaiting rebirth, from the plane which is harmonious to the energy of the union (the vortex is a composite aura of the couple.)
Once attracted, the Soul will be drawn into the female womb and will enter into a new physical life (all conditions be procreant).
Before being born again, the Soul will obtain knowledge of the life to come. Then is the plan realized.