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2. QUESTIONS
How do you think a baby is formed?
What do you think are the important things both
parents will pass on to their child during the
formation of a baby?
3. REPRODUCTION IN HUMANS
Well, before a human can
reproduction sexually,
How does sexual the body
certain organs in
reproduction
must develop and
occur in
mature.
humans?
4. REPRODUCTIVE SYSTEM
Which part of the human body are involved in
sexual reproduction?
16. HOW DOES FERTILIZATION OCCUR?
1. There is mating
2. Sperms are introduced into the female through
the vagina.
3. The sperms swim through the uterus to the
oviduct towards the egg.
4. A sperm bumps into the egg.
5. The sperm penetrates the egg membrane.
6. The tail drops.
7. The egg membrane thickens to prevent other
sperms from entering.
8. The sperm nucleus fuses with the egg nucleus.
20. HOW DOES IT HAPPEN?
Puberty - specific changes in the male
Boys usually reach puberty at an average age
of 13 years.
Sex organ starts to produce sperms
Shoulder and chest become broader
Voice breaks and deepens
Moustache and beard start to grow
21. HOW DOES IT HAPPEN?
Puberty - Specific changes in the female
When a baby girl is born, the ovaries already contain
around 400 000 ova or eggs.
Girls tend to mature two years earlier than boys
(average age of 11)
When she matures, a small fraction of these eggs
mature (approx. 450) and is released from alternate
ovaries each month.
Breasts develop
Hips widen
Undergoes the menstrual cycle
22. PERIOD – START OF
PUBERTY
It is a cycle that all
mature girls go
through.
One cycle takes
approximately 28
days.
Menstruation >>
Repair >> Ovulation
>> Prepare for
Implantation.
26. FACTS ABOUT MENSTRUAL CYCLE
What is the mean duration of the
MC?
Mean 28 days (only 15% of ♀)
Range 21-35
What is the average duration of
menses?
3-8 days
What is the normal estimated blood
loss?
Approximately 30 ml