An oral contraceptive contains hormones that inhibit FSH production. How does this help prevent pregnancy?
No egg matures, so an egg is not available for fertilisation.
No sperm forms, so sperm cannot travel through the oviduct.
No uterus lining forms, so an egg cannot leave the ovary.
No progesterone forms, so sperm cannot enter through the cervix.
62 exam-style questions on AQA GCSE Biology 5.3 Hormonal coordination in humans, covering 5.3.1 Human endocrine system, 5.3.2 Control of blood glucose concentration, 5.3.3 Maintaining water and nitrogen balance in the body, 5.3.4 Hormones in human reproduction, 5.3.5 Contraception, 5.3.6 The use of hormones to treat infertility (HT only), and 5.3.7 Negative feedback (HT only). Each one has a worked solution and a mark scheme showing where the marks go.