Puberty starts and continues with your hormones controlling the show. Changes in your body can happen very slowly or very quickly.
Sometimes everything slows down (like when you feel like you’ve had the same zit in the exact same spot for a month), sometimes there are growth spurts (like when you come to school one day and realise your best friend is suddenly taller than you!).
The development stages in the table above are intended as guidelines only. Each person is unique and will develop at their own pace and at their own time.
Thanks to Geoff Price and Allen & Unwin for allowing us to reproduce this graph. Taken from the Book Puberty boy by Geoff Price