how menstruation happens to woman

1. Starter
• What can you remember about
HOMEOSTASIS – keeping things the same?
• Try the quiz in pairs
• Use your notes to help you
• Prize for first to finish and best

2. Kevin the teenager
• What’s causing Kevin’s mood swings?

3. Title: Hormones
• Hormones are c________ messengers, which
control different body functions.
• For instance, i__________ controls blood
sugar levels.
• T______ and o________ are male and female
sex hormones, which are released for the first
time during p________.
• Hormones are released by g_______.

4. The menstrual cycle
Label…
• The ovaries
• The uterus
• The eggs
• The lining of
the uterus
• The time when
the woman will
be fertile

5. Menstrual cycle – fact hunt
• Follow the progress of the menstrual cycle
around the room
• Label the following on your diagram
– All the days when FSH is released
– All the days when oestrogen is released
– When FSH stops being produced and why
– When LH is released and what this does

6. Day 5
• Follicle stimulating hormone (FSH) starts to
be released by the pituitary gland in the brain
• The hormone travels in the blood to the
ovaries
• The egg begins to develop

8. Day 7
• The egg signals to the
ovaries as it develops
• The ovaries start to
produce the hormone
oestrogen
• This causes the lining of
the womb to build up

9. Day 15
• The ovaries are now producing so much
oestrogen that it is detected by the brain
• The brain stops producing FSH and produces
another hormone instead
• This is called luteinizing hormone (LH)
• LH triggers ovulation – the release of the egg

10. Day 28
• If the egg is not fertilized, the lining of the
uterus is shed
• This causes menstrual bleeding – or a period –
which lasts for a few days
• The cycle starts again