As an adult, you probably remember puberty - a time when your body went through a lot of changes. And now you're the parent of a child who's experiencing these changes. You'll want to know what to expect so you can help your child through each stage of development.
Today, these stages are known as the Tanner stages or, more appropriately, sexual maturity ratings. They serve as a general guide to physical development, although each person has a different puberty timetable.
Read on to learn about the Tanner stages and what you can expect to see in boys during each stage.