“But,” you might ask, “what about the particular family I was born into or the family I was adopted into? Was that part of God’s plan for me?” Elder Alvin R. Dyer said: “The very nature of each person . . . would require that the lineage of birth fit the caliber of their person. . . . Equality of birth is not actually possible, because there is no equality of all spirit persons. Thus to bring about birth into mortality there must have been a plan to calibrate birth in a lineage and manner best suited to the need of potential growth and development in the Second Estate” (The Meaning of Truth, 23 24). Because He is omniscient, God knew where each of us would have the best opportunity to grow and reach our full potential as an heir of eternal life. Each of us is free to choose how we will respond to the mortal assignments we are given, free “to act for [ourselves] and not to be acted upon” (2 Nephi 2:26). Of Jesus, born into the most humble of circumstances in Bethlehem, Isaiah wrote: “He hath no form nor comeliness; and when we shall see him there is no beauty that we should desire him. He is despised and rejected of men; a man of sorrows, and acquainted with grief” (Isaiah 53:2-3; Mosiah 14:2-3). Still, Jesus became “Lord of lords, and King of kings” (1 Timothy 6:15; Revelations 17:14; 19:16). Abraham, who became known as “the father of the faithful” (D&C 138:41), and the “founder of the covenant race” (Bible Dictionary, p. 601), was born into an idolatrous home. Moses, the meekest man on the face of the earth (see Numbers 12:3), and of whom it was said “there arose not a prophet since in Israel” (Exodus 34:10) like him, was born into Israelite bondage.

Entire talk here: (it’s in the employee part of their website):
http://emp.byui.edu/marrottr/Family-No%20choice%20in%20preex.htm