When you hold your baby in your arms for the first time you may daydream about the future. You may envision your child losing their first tooth, tasting ice-cream for the first time, or hitting a home-run at their first baseball game. Your vision probably includes an expectation that your child will progress through the normal milestones of development. In your mind’s eye you see your child learning how to walk, run, and ride a bike. Somewhere in the future your child is making friends and...