The menstrual cycle is controlled by hormones.
The Table shows information about three of these hormones.
Table
| Hormone | Where it is made | Function |
|---|---|---|
| FSH | pituitary gland | |
| oestrogen | causes the lining of the uterus to thicken | |
| progesterone | ovary |
Complete the Table.
A woman's period starts on 3 March. This is day 1 of her menstrual cycle. Her cycle lasts 28 days and ovulation happens on day 14.
Give the date on which ovulation is most likely to happen.
Some women do not release enough FSH.
Explain why these women may not be able to become pregnant.
84 exam-style questions on OCR GCSE Biology 3.2 Coordination and control – the endocrine system, covering 3.2.1 Principles of hormonal coordination and control, 3.2.2 Roles of thyroxine and adrenaline, 3.2.3 Hormones in human reproduction, 3.2.4 Interactions of reproductive hormones, 3.2.5 Hormones in contraception, 3.2.6 Hormones in reproductive technologies, 3.2.7 Plant hormones in growth and coordination, 3.2.8 Effects of plant hormones, and 3.2.9 Uses of plant hormones. Each one has a worked solution and a mark scheme showing where the marks go.