What are the physical changes during puberty?

These can be formally graded into 5 stages (from pre-puberty to full sexual development). Genital development (appearance of penis, testes and scrotum) and pubic hair are scored in boys while breast development and pubic hair are scored in girls. Menstruation in girls starts towards the end of puberty when the growth spurt is almost complete.

These are the stages described by Tanner.

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