Religious question

I am not a religious person, though I am not completely ignorant of the subject. Still there is something keeps me wondering. In the pro-adoption community is an strong representation of christian factions. People who as I have come to know have a belief in the Will of God. I would say, from a religious point of view, pregnancy is an expression of God's will. So if God chooses a woman to become pregnant, why would he want it raised by strangers?