One more thing, I too, have no cancer in immediate family. Grandma died of 85 (I think from malpractice), and Mom died at 75 of heart related issues. I am the oldest of 3 girls and I am the only one who had a child and I can't figure it out either. Also, don't think my mother took DES. That is one more reason why your treatment is encouraging to me!
God's richest blessings on you!
Chris