Mina is preparing for a three-month placement on a ship. She wants a reversible hormonal contraceptive method that contains no oestrogen and does not involve fitting a device. The method must work for about three months without daily or weekly action.
Which method is the most suitable for Mina?
A progesterone-releasing intrauterine system
A progesterone injection
A progesterone-only pill
A combined hormonal skin patch
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.