All souls are created by God and have their own place. They encompass the attributes of both male and female. They watch closely around the earth and have an awareness when conception takes place. It is then up to the soul accompanied by it's spirit in which it resides. The soul then decides which one to inhabit along with the spirit. It has been said that the soul chooses the parents but, the soul is far more important than a human because the soul is the real 'person'. If it is the male aspect of the soul that inhabits the new life, then, its counterpart, the female aspect waits until a favourable conception occurs and will do the same as previously mentioned. This duality of male and female aspects of the soul is the reason for the term soulmates. There are many initial thoughts as to exactly when the spirit and soul inhabit the newly formed life, personally, I think the spirit places itself inside as soon as conception has occurred and the soul does the same just before the birth of a new life. They remain within the human until it passes from this world. I posit that the soul remains within the spirit until it is decided what happens once they enter next world, dimension, heaven or one of the various spirit realms. The soul then lives on in the spheres of God's spirit worlds that represent the the condition of the soul and all that it has learnt. Then I can only surmise that the soul will either stay close or choose to move to another place for further growth especially, if one believes that we have multiple lives happening concurrently in different worlds. I am more sure that the soul will eventually depart from it's alliance with the human spirit. As the soul remains eternal, it is always seeking new experiences and encompasses all experiences that it has learnt for growth. That is not to say that the human experience the soul has undertaken is lost as, I believe, the human aspect of the soul is only one of many it will experience but the bond will remain.