Doctors, what are the stages of puberty for boys?

Five stages...: These are the general stages: 1. Growth of testes/scrotum, fine pubic hair. 2. Rapid body growth, continued increase in pubic hair. 3. Penis grows; continued rapid body growth; voice starts changing. 4. Continued increase in penis size; course pubic hair; hair in armpits and face; can; even faster body growth. 5. Final adult height and male physique. Hope that helps!