1. ความเป็นหนุ่มสาว

2. Almost everyone grows and goes
through puberty- but not everyone!
The girl on the
left is 16 years
old. But physically
and mentally she
is like a baby!

3. Lawrence Koomson- Boy man
Lawrence Koomson
didn’t go through
puberty until age 33.
Doctors gave him
testosterone to make
him start puberty.
It was successful!

4. Hormones are released by the brain to
start puberty.
• In boys, testosterone is released.
• In girls, estrogen is released.

5. Girls start puberty at age 10-11, finish
at age 15-17
Boys start at age 11-12, finish 16-17

6. The average age of puberty has been
dropping since 1840.
Some
people think
chemicals in
our food is
causing this.
Menarche
means a
woman’s
first period.

7. Body changes

8. Growth spurt
You may be hungry all the time.
You will grow fast in your mid-
teens.

9. clumsy
When you are
growing very fast,
sometimes it is
hard to control
your body.

10. Growth plates
Growth plates are
where your bones
grow.
If they are injured
before adulthood, it
could be a problem.

11. Body hair Chest hair
Pubic hair
Armpit hair

12. Body odor
Adults have stronger
body odor than
children.
Wash your armpits
and groin well.

13. Acne- pimples and zits
Your skin makes
more oil during
puberty, which
can cause acne.

14. Voice cracking
When the larynx is growing quickly, sometimes boys
cannot control their voice and it “cracks”.

15. Adam’s apple
Men have one, but
women don’t.

16. Boys during puberty sometimes
cannot control their erections.

17. Penis and testicles get larger.

18. Nocturnal emissions- “wet dreams”
Sometimes boys
may wake up with
semen on their
sheets.
This means they
probably had a
sexual dream.

19. Women gain fat during puberty. Some
fat is healthy!
A woman
stores fat
on her
body in
case she
gets
pregnant.

20. Some girls wear a training bra
A training bra is for
girls who are just
starting to grow
breasts.

21. menstruation
A woman’s period usually lasts
from 3-7 days.

22. What to do when you have your first
period?

23. Tampons or maxi pads?
tamponMaxi pad
Maxi pads are safer,
but may not be as
comfortable.
Tampons must be
changed often!

24. Should you exercise during
menstruation?
Yes! You can even swim
during your period.

25. Don’t flush tampons and pads down
the toilet!

26. When does puberty end?
• Puberty usually ends between 18-20 years old.
• But men often don’t get full facial hair until
they are 25 or older.

27. Sexual awakening
During puberty,
hormones make us
feel sexual
attraction.

28. Questions
• What are some of the things that happen
during puberty?
• Who starts puberty first, girls or boys?
• What hormone starts puberty for men? What
about for women?
• How long is a woman’s menstrual cycle?
• What kinds of new hair do people grow during
puberty?

29. Questions for the teacher
• Please think of at least
one question to ask
about puberty, and ask
it next class.
• If I can’t answer it then,
(I don’t know
everything!) I will
answer it in the next
class.