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If you're in your teens, you may feel as if you don’t know your body anymore and you don’t know what to expect from one day to the next. Here's what to expect and when. BY ELISE-MARIE RANCRED AND THE HEALTH24 TEAM for YOU Pulse magazine
| BOYS | AVERAGE AGE | AGE WINDOW |
| 1.Testes begin developing | 11,5 | 9,5-13,5 |
| 2. Pubic hair appears | 12 | 10-15 |
| 3. Penis begins enlarging | 12 | 10,5-14,5 |
| 4 Height shoots up | 12,5 | 10,5-16 |
| 5. First erection and ejaculation | 13 | 12-16 |
| 6. Height growth peaks | 14 | 12,5-15,5 |
| 7. Beard appears | 14 | 12,5-15,5 |
| 8. Voice breaks | 14 | 12,5-15,5 |
| 9. Penis development complete | 14,5 | 12,5-16 |
| 10. Pubic-hair growth complete | 15,5 | 14-17 |
| 11. Reach adult size | 15,5 | 13,5-17,5 |
(This is an edited version of a story that originally appeared in YOU Pulse / Huisgenoot-POLS magazine, Autumn 2008. Buy the latest copy, on newsstands now, for more fascinating stories from the world of health and wellness.)
