1. Female Sex Hormones By the end of the lesson you should be able to: 1. Say 2 effects of female sex hormones, and say where the hormones are made. 2. Describe and explain the roles of Oestrogen, FSH and LH

2. Can you remember the parts of the female reproductive system?

3. The Menstrual Cycle  What happens during the cycle?  Menstruation  Ovulation  Lining of the Uterus  Fertilisation?

4. Hormones  The monthly release of an egg from a woman’s ovaries and the changes in the thickness of the lining of her womb are controlled by hormones  The hormones are secreted (released) by the pituitary gland and by the ovaries.

5. Which hormones are involved?  Oestrogen made in the ovaries  Follicle stimulating hormone (FSH) made in the pituitary gland  Leutinising hormone (LH) made in the pituitary gland

7. Hormones GlandEffects OestrogenOvariesInhibits FSH and stimulates LH in the pituitary. Causes the lining of the womb to thicken FSHPituitaryCauses eggs to mature in the ovaries. Stimulates the ovaries to make oestrogen LHPituitaryCauses ovulation

9. Controlling fertility?  Some women are infertile  Some women do not want to be fertile

10. Increasing Fertility  Women can be given hormones to stimulate the release of eggs from the ovaries (fertility drugs)  This fertility drug is FSH which stimulates eggs to mature

11. Reducing Fertility  Oral contraceptive pills contain hormones that prevent the release of eggs from the ovaries.  The Pill contains oestrogen which inhibits FSH production, so no eggs mature.

12. The male pill?  How would it work?  How would you test it?  What economic implications would you have to think about?  How would you know its effects?  How would you come up with a % effectiveness?