The Table shows information about some methods of contraception.
Table
| Method | Type of method | Number of pregnancies per 100 women in one year with typical use |
|---|---|---|
| implant | hormonal | 0.05 |
| combined pill | hormonal | 9 |
| male condom | non-hormonal | 18 |
| diaphragm | non-hormonal | 17 |
Calculate how many times more pregnancies there are with the male condom than with the implant.
Explain how the hormones in the combined pill prevent pregnancy.
The implant releases hormones slowly over three years.
Suggest why the implant has a much lower pregnancy rate than the combined pill with typical use.
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.